Do you know all the 11 major diseases of sows after parturition?

In view of 11 problems such as common mastitis in lactating sows, no milk after childbirth, no eating after childbirth, postpartum fever, postpartum endometriosis, stubborn constipation in sows, postpartum paralysis, no estrus, multiple mating failure, hypothermia, dystocia, no placenta, etc., Teacher Shi discussed them one by one.

mastitis

1. Symptoms of mastitis

01. Breast swelling, fever, hardness and pain;

02. The milk is thin, mostly whey like, and contains floc;

03. When it develops to purulent nature, yellow pus and tissue fragments can be discharged;

04. Increased body temperature, decreased appetite, preferring to lie down and unwilling to stand;

05, chronic mastitis can lead to breast atrophy.

2. Causes of mastitis

01. Breast injury or bite during lactation, nipple injury Due to sharp canine teeth of piglets, bite sow breast when stealing milk, secondary bacterial infection;

02. Improper prenatal feeding control;

03, suffering from brucellosis, tuberculosis or endometriosis;

04, sow litter size is small, breast no piglet sucking or individual breast no piglet sucking caused by breast swelling, breast bacteria reproduction, and then mastitis;

05. Excess milk is mainly due to excessive concentrate feeding, excessive nutrition, vigorous lactation of sows and incomplete lactation of piglets;

06, piglets weaned too early, breast did not suck caused by breast swelling.

3. Prevention and control technology

01, before delivery should reduce the amount of feeding;

02. Do not feed on the day of weaning;

03. Houttuynia cordata 30ml + Cephalosporin 1g, mixed intramuscular injection;

04. Severe mastitis can also be treated with block therapy: 0.25% procaine hydrochloride solution 50ml+ penicillin 800,000 units, streptomycin 500,000 units, mixed injection in the gap between breast parenchyma and abdominal wall, once a day;

05. Infusion therapy: 10% glucose 500ml, kanamycin 100- 1.5 million units, dexamethasone 5-10ml and VC10ml mixed intravenous injection;

06. The delivery room is clean and hygienic, and potassium permanganate (0.1%) or bromogeramine (0.1%) is used for disinfection before delivery;

07. 5~6 hours after the treatment of block around the breast bottom. Ampicillin 3g and streptomycin 2g can be injected intramuscularly to improve the efficacy;

08. After breast milk is squeezed and cleaned, hot compress, touch the breast until soft, twice a day for 2 consecutive days.

Mastitis occurs more, but easy to treat, must be treated in time when it occurs, so as not to affect the piglets feeding caused by death.

puerperal milk loss

Metabolic disorders caused by endocrine disorders, leading to lactation stop, at this time the breast soft, reduced size, no heat swelling pain phenomenon, the body gradually thin.

1. Causes of postpartum lactation

Postpartum milk, postpartum fever milk, postpartum feed intake or poor nutrition, feed mildew poisoning, diseases caused by such as blue ear disease, epirythrocytosis, postpartum mastitis, endometriosis, endocrine disorders caused by.

Special attention should be paid to mastitis, breast edema, according to anatomical findings, the occurrence of lactating sow, its mammary gland tissue edema phenomenon. Udder edema is an inevitable physiological phenomenon in sows. If you don't pay attention to it, it will often cause bacterial and viral infection, which will eventually turn into mastitis and lead to lack of milk. Breast edema should eliminate breast edema fluid, adjust breast lactation function, promote lactation function normal, at the same time should pay attention to the disinfection of delivery house.

2. Treatment

01. VB1:10 ml, intramuscular injection, dexamethasone 5-100 mg, intramuscular injection, once a day, for three days;

02. Cloprostenol 2 ml, IM, once;

03. Metoclopramide 1 mg/kg, intramuscular injection once a day for three consecutive days.

04, prolactin injection or oxytocin 20-30 units per head intramuscular injection, once a day, for 3 days.

05. Houttuynia cordata injection 30ml + porcine transfer factor mixed intramuscular injection, once a day, for 3 days.

6. Traditional Chinese medicine therapy: Vaccaria seed 40g, pangolin 15g, Akebia 10g, Astragalus membranaceus 20 g, Angelica sinensis 20 g, Codonopsis pilosula 20 g.

07, folk prescription: cooked peanuts 1 jin +6 - 7 eggs, once a day, for 3 days.

Postpartum lactation should be highly valued, especially if piglets do not eat colostrum, it will be difficult to raise.

Sows do not eat after childbirth

Pig sow postpartum do not eat a lot of problems, caused by: disease, sow fever such as blue ear disease; labor feeding or feed improper; mycotoxin poisoning; postpartum fatigue body weakness; postpartum abdominal pain constipation, limb disease; lack of nutrients, such as calcium, vitamins, etc.; hypothermia.

The reasons for not eating postpartum are classified as follows:

1. Feed and feeding methods for pregnant and lactating sows

Improper preparation and feeding methods of feed during pregnancy and lactation will cause damage to reproductive system and embryo, affect sow constitution and cause postpartum anorexia.

2. Reproductive system inflammation

Sows in the production process caused by birth canal damage, the occurrence of parturition inflammation; placenta or placenta incomplete, the occurrence of metritis, can cause postpartum anorexia.

3. Postpartum water shortage

In the process of sow production, due to exertion, sows sweat or even collapse, urgent need to supplement water, but some sow farmers still follow the traditional concept, think that sows can not drink water after childbirth, resulting in sows can not timely supplement water, which is also a major cause of postpartum anorexia.

4. Environmental and climatic factors

After sow farrowing, the body is very weak, such as environmental dirty or changeable climate, can cause sow cold or induce other diseases, resulting in sow postpartum anorexia.

5. Less prenatal exercise

At present this county sow is captive mostly, in the later stage of pregnancy more inconvenient movement. Due to less prenatal exercise, sow physique decline, and more prone to dystocia, leading to collapse, which is also caused by sow postpartum anorexia is another main reason.

6. Sows self-feeding placenta or stillbirth

Some sows like to eat their own placenta or stillbirth after childbirth, which will cause severe dyspepsia in sows and cause postpartum anorexia.

7. Variety reasons

With the development of production, sow breeds are constantly updated and gradually tend to be varietal. The better the breed, the worse its resistance, and the easier it is for people to suffer from postpartum anorexia.

8. Lack of certain trace elements and vitamins

Trace elements and vitamin deficiency, will make sow postpartum metabolic disorders or metabolic disorders, resulting in postpartum anorexia

Do not eat symptoms after childbirth

Sows postpartum stubborn little food or no food, listlessness, limb weakness cold, afraid of cold, normal temperature, stool thin or spherical, long voice very weak, urine less, and then milk reduction.

Postpartum not eating prevention

1. Prevent udder edema in sows;

2. Avoid infection after sow delivery;

3. Reduce the body temperature of sows: drop water to cool down, improve the environment, reduce ammonia and temperature, and reduce the content of crude fiber in sows (such as bran) to reduce heat consumption;

4. Eat less and eat more and use wet food;

5, increase the palatability of sow feed.

No treatment after childbirth

1. Metoclopramide: 1mg, intramuscular injection;

2. Kangweisu: 1.5- 2g, twice a day for three days;

3, vinegar: 500ml, yeast powder 150-200 grams once a day, for three days.

postpartum fever

Summer and autumn season, sow postpartum fever, mostly occurred in 3~7 days after birth, temperature increased to 35~41℃. Due to sow fever, loss of appetite or waste, lactation is reduced or stopped, resulting in insufficient milk for piglets and affecting growth and development, even causing death of the whole litter, causing great economic losses to pig farmers.

1. Postpartum fever symptoms

Sows after birth, in a short period of time suddenly increased body temperature, depression, loss of appetite or waste, reduced lactation or no milk, piglets because of insufficient milk and barking.

01. Sick pigs with pneumonia, body temperature increased to 40~41℃, high depression of spirit, loss of appetite, flushing of conjunctiva, accelerated respiration, asthma, cough, yellow-white viscous nasal fluid flowing out of nostrils, obvious inflammatory changes in lung auscultation.

02. Sick pigs with gastroenteritis, whose body temperature rises to 39.5~40℃, are depressed, do not eat food, like to drink cold water and sewage. Some sick pigs vomited yellow sticky stomach contents, feces were thin paste, with mucus and mucosa, smelly.

03. Sick pigs with endometritis, body temperature increased to about 39.5℃, listlessness, loss of appetite. Sick pigs appear bow waist, nudge and urination posture, from the vulva discharge gray turbid floc or purulent matter.

04. Sick pigs with mastitis can see one or several mammary glands flushing and swelling, pain, thin milk squeezed out, containing flocs, pus can be squeezed out by purulent pigs, sows resist piglet lactation, and the body temperature rises to 39.5℃.

05, there are also unnamed high fever caused by Eperythrozoon or other factors: every year, unnamed high fever has some characteristics, it is best to combine laboratory diagnosis, targeted treatment.

2. Postpartum heat prevention

01. For pigs with high body temperature but appetite: penicillin 400~500 million international units, streptomycin 100~200 international units, intramuscular injection; or ceftiofur sodium lyophilized powder intramuscular injection, once a day.

02. For sick pigs with high body temperature and poor appetite: apply 5% glucose saline 500~1000 ml, penicillin 400~ 5 million international units, vitamin C 10 ml; or 5% glucose solution 500 ml, 10% sulfadiazine sodium 20~40 ml, 5% sodium bicarbonate 20 ml, ear intravenous drip, 1~2 times a day.

03. For sick pigs with pneumonia and cough symptoms: 50~ 100g Qingfei Zhike Powder, 10~ 20g 20% Tilmicosin premix, or Zhiyuanjing or doxycycline should be taken orally;

04. Pigs with gastroenteritis: oral administration of 10% enrofloxacin soluble powder 20~ 30g, 2~3 times a day, intramuscular injection of 6~ 8ml of emol for severe vomiting;

05. Endometritis pigs: uterine suppository (chlorhexidine acetate suppository 2 tablets/time, intramuscular injection of antibiotics at the same time;

06, mastitis pigs: Gongying powder 100 grams, boiled water, irrigation or mixed into feed, once a day, even 3~4 times.

Due to the complexity of postpartum fever in sows, clinical treatment should be dialectical. At the same time, it is necessary to strengthen feeding management, feed sows with nutritious and digestible feed, do a good job in house sanitation and disinfection, and do a good job in cold weather in winter and spring. At the same time carefully do a good job of piglet care, timely supplement milk, reduce piglet death.

Postpartum fever must be treated continuously to avoid repeated illness.

Also encountered a case: unknown cause, onset of sudden high fever above 40 degrees, skin redness, dry stool, urine less, do not eat, like to drink cold water fever syndrome, shared the treatment plan:

01. Compound aminopyrine, 10ml injection, once a day, for three days;

02. Penicillin 1.6 million units, streptomycin 1 million 2, saline 20ml fully dissolved intramuscular injection, twice a day, for three days;

03, vinegar 3 jin, after heating, add 200 grams of mirabilite, apply breast with hot towel, twice a day, swelling after three days.

Pay attention to postpartum stress, pay attention to Eperythrozoon, can also cause high fever, leading to many problems in sows.

postpartum endometritis

According to the reports of some authoritative organizations and the actual situation of most pig farms, endometriosis is a high incidence of sow disease, 80% of pig farms have had this kind of disease, especially more than 3 multiparous sows, more or less inflammation, resulting in very large economic losses, will lead to sow weak offspring, to attach great importance to, and not easy to root, difficult to cure.

1. Endometritis in gilts and gilts

Exogenous infection is likely to occur in gilts during oestrus, during parturition and early postpartum, and endogenous infection caused by subclinical parvovirus, swine fever virus, pseudorabies virus or streptococci may occur in gilts and gilts.

2. Endometritis in multiparous sows

The resistance of sows in parturition, dystocia and puerperium decreases, and the environment during parturition is unclean, the birth canal is damaged or does not reach the aseptic operation during midwifery, the placenta does not fall, the postpartum lochia, etc., thus promoting sow endometriosis; the artificial insemination instrument is not completely disinfected, the sperm does not reach the aseptic operation standard, and the treatment operation uterus is not properly washed, which can also cause sow endometriosis.

Acute symptoms are easy to detect, chronic cases are often easy to neglect. Clinically, metritis is mild at first, and treatment does not completely cause rebound, beyond uterine horn problems, and slowly produces fewer children until infertility. The following are some of the symptoms of endometriosis:

acute uterine perichondritis

Sows appetite decreased, body temperature increased, frequent urination, hunched back, nuff, discharge from the vulva with gray floc secretions and purulent secretions, lying down when more discharge.

chronic catarrhal endometritis

Sows generally have no systemic symptoms, sometimes slightly elevated body temperature, decreased appetite and lactation, abnormal estrous cycle, sometimes normal estrous but repeated mating infertility, slightly cloudy reflux when washing uterus, like rice washing water or clear nose liquid.

chronic catarrhal purulent endometritis

Sows have mild systemic reactions, gradually emaciated, abnormal estrous cycle, gray or yellow thin pus from the vulva, tail root, vulva, fibula often sticky vaginal discharge and form dry scab.

chronic purulent endometriosis

Purulent secretions are often discharged from the vulva, which are more when lying down. Purulent secretions adhere to the periphery of the vulva and the root of the tail, forming thin scab after drying. When washing the uterus, the reflux is cloudy, like a thin paste, sometimes yellow pus.

3, sow endometriosis treatment

systemic therapy

When the pig is accompanied by systemic symptoms such as elevated body temperature and decreased appetite, systemic treatment can be carried out first. Cefradine or ceftiofur sodium 1 g and streptomycin 1 million international units can be injected intramuscularly. When the systemic symptoms are improved, the uterus will be administered again. Feed Riga amoxicillin and Astragalus polysaccharides or other good Chinese medicine treatment.

douche uterus

When vulva discharge inflammatory substances thicker, containing flocculent substances, postpartum lochia, available 0.2% Baijunxiao solution 500-1000 ml, with enema or disposable coarse device repeatedly washed to remove the inflammatory substances retained in the uterus.

intrauterine administration

01. Rinse first and then administer. At the same time, inject 50 international units of oxytocin intramuscularly. After washing uterus for 2-3 hours, use 90 ml of 0.9% normal saline, add 10 ml of sodium bicarbonate, dilute lincomycin and neomycin, and put them into uterus. Administer continuously for 3 days, and rinse once every other day. Those who do not recover after this treatment should be eliminated.

02, direct intrauterine administration When vulva discharge inflammatory substances are lighter, found earlier available 0.9% normal saline 100 ml, diluted lincomycin and neomycin 2 g and oxytocin 40 international units direct intrauterine administration, 3 consecutive days did not improve, with 0.2% Baijunxiao solution 1000 ml rinse.

Obstinate constipation of sows

Stubborn constipation of sows is a disease that is difficult to treat in the process of pig production. Diseased pigs are characterized by loss of appetite or refusal to eat, lack of energy, unwilling to move, sometimes lying in a circle, the dung ball is small like an abacus, the sows with a long course of disease are relatively weak, and finally die of serious physical failure.

1. Causes of sow constipation

01. Exuberant deficiency fire and slow gastrointestinal peristalsis caused by endocrine disorders in sows are the direct factors of sow constipation.

02. High temperature stress. In the midsummer season, the high temperature of more than 35 ℃ for several days can cause high fever reaction in sows and lead to water and salt metabolism disorder and constipation.

03. Lack of exercise. Excessive density, crowding and lack of exercise can also lead to constipation.

04. Insufficient drinking water. Insufficient drinking water caused by various reasons is an important cause of sow constipation.

Drug-induced constipation: at present, as there are many diseases in pigs, pig producers use irregularly feeding drugs to pigs to prevent diseases. For example, sulfonamides are added to sows to prevent toxoplasmosis, arsanilic acid and oxytetracycline are added to feed to prevent eperythrozoonosis, and Zhiyuanjing is added before and after giving birth. Some feed manufacturers, in order to achieve the purpose of disease prevention, rather than considering the particularity of sows, also add a certain dose of antibacterial growth-promoting agents, such as chlortetracycline, bacillus peptide zinc and so on. The gastrointestinal tract of sows is under the action of antibiotics for a long time, which will inevitably lead to excessive absorption of water in the gastrointestinal tract of sows, imbalance of flora and constipation.

Constipation caused by thermogenic diseases, such as classical swine fever (mostly mild), toxoplasmosis and blue ear disease, can cause constipation in sows.

07. Improper preparation of feed. The content of crude fiber in feed is insufficient or too high, the content of inorganic substances such as gravel and dust is too high, or a large number of bedgrasses lead to poor excretion and constipation; especially the lack of green fodder, the level of energy and protein is too low, crude fiber is too high, micronutrients such as trace elements and vitamins deficiency can also cause physical weakness constipation; in addition, improper feed processing, excessive particle size can also cause constipation.

Why does sow feed add a lot of crude fiber or constipation? The main reason is that sows produce breast edema. If the problem is not solved by adding high fiber raw materials (such as wheat bran) to sow feed, the problem of constipation cannot be improved. And excessive addition of wheat bran has the following disadvantages:

01. Reduce the nutrient concentration of the formula.

02. Occupy the stomach space of sows and reduce the nutrition intake of sows.

Wheat bran will produce a high amount of heat consumption, which will not only cause a waste of energy, but also increase the body temperature of sows and aggravate the anorexia of sows after delivery.

2. Prevention and treatment of sow constipation.

01. Rational preparation of diets. According to the feeding standard of sows, a reasonable feed formula can be designed to meet the nutritional needs of different stages and different physiological states, provide appropriate energy levels, balance calcium and phosphorus, and pay attention to the addition of organic selenium and multivitamins. Qualified farms can choose high-quality special feed. At the same time, sows can be provided with appropriate amount of green feed, which can not only increase appetite, supplement natural vitamins, promote lactation, prevent constipation, but also save costs.

02. Make sure you drink enough water. Lack of drinking water will cause a series of problems in sows, such as loss of appetite, indigestion, constipation, metabolic disorder, insufficient lactation and so on. Therefore, it is necessary to ensure that sows have adequate drinking water that meets the sanitary quality standards.

03. Exercise properly. Sows can reduce exercise and keep quiet during 1-3 weeks of mating and 1-2 weeks before parturition, so as to prevent miscarriage or premature delivery caused by unexpected stimulation. However, in the second trimester of pregnancy (20 days after mating to 100 days of pregnancy), sows should be given proper exercise and light to promote the normal development of the fetus and prevent constipation and dystocia.

Strengthen environmental regulation and control to reduce hot and cold stress. Pig farms should pay attention to the application of environmental control technology. In summer, we should do a good job in preventing heat and cooling, and in winter, we should seriously implement measures to prevent cold and keep warm, so as to provide a suitable living environment for sows. High temperature, high humidity and cold will not only bring negative effects on sows, but also become the cause of constipation.

05. Rational use of feed. Pig farms should use drugs scientifically to prevent diseases so as not to produce drug-induced constipation in sows. Don't add drugs to sow feed at will. Try to use sow special feed, do not use fat pig feed to raise sows.

Use drugs at the right time. After the occurrence of constipation, pregnant sows can be given appropriate amount of glycerol or vegetable oil. Postpartum sows can take appropriate amounts of sodium sulfate, magnesium sulfate, rhubarb, artificial salt, paraffin oil and so on.

Sow constipation can be effectively solved by comprehensive feed, disease, increasing drinking water and other aspects.

Postpartum paralysis

Postpartum paralysis, also known as postpartum paralysis, is a sudden occurrence of acute hypoglycemia characterized by quadriplegia in sows. It can occur regardless of breed, age, parity and body condition. It is mainly caused by improper feeding and management, lack or imbalance of calcium and phosphorus in feed, lack of exercise and light, and dampness in enclosure.

1. Clinical symptoms

Postpartum paralysis of sows usually occurs 2-5 days after delivery. It is characterized by loss of appetite, dry and hard stool at the beginning of the disease, and then gradually stop defecation and urination. The body temperature is normal or slightly elevated. Mentally depressed and in a lethargic state. At the beginning of the disease, the gait is unstable, the hind limbs are weak, the ground cannot afford for a long time, the limbs are numb and cold, and the stimulation response is weakened or unresponsive. Muscle pain, shallow breathing. Gradually lose weight, exhaustion and death.

2. Preventive measures

Improve feeding management, reasonably match feed diet, supplement mineral feed. Strengthen the pre-and post-natal care of sows and clean hay with more pads. Keep the enclosure dry and ventilated. Pregnant sows are fed 20 grams of bone meal and 20 grams of salt every day.

3. Treatment methods

Prescription 1: each head is supplemented with 20 grams of veterinary bone powder, 5 grams of calcium lactate, or 30 grams of calcium hydrogen phosphate per day. Add 20 ml cod liver oil to livestock and poultry twice a day for 10 days.

Prescription 2: infusion treatment: 10% calcium gluconate 50ml 150ml, or 25% 50% glucose 100ml 250ml, intravenous injection, once twice a day for 3 days. At the same time, scrub the limbs of diseased pigs with rice wine or warm water, once or twice a day.

Prescription 3: 25 grams of Eucommia ulmoides, 30 grams of Dipsacus, 20 grams of Angelica sinensis, 40 grams of dog ridges, 20 grams of kaifeng vine, 20 grams of thousand-year health, 20 grams of Achyranthes bidentata, 20 grams of Sichuan papaya, 13 grams of Shenqu, 20 grams of Su stem, 30 grams of cooked land, 100 ml of rice wine after frying.

Prescription 4: 15 grams of Achyranthes bidentata, 15 grams of Chuanduhuo, 30 grams of Dipsacus, 15 grams of compound flowers, 30 grams of Gentiana, 15 grams of Eucommia ulmoides, 12 grams of Chuanxiong, 12 grams of red peony, 30 grams of papaya, 9 grams of frankincense, 15 grams of myrrh, 30 grams of big moxa, 30 grams of Schizonepeta tenuifolia, 1 dose in 2 days, 3 doses in a row. If the sow is paralyzed and the milk is insufficient, the king will not leave 30g.

Prescription 5: 270 grams of bone meal, 40 grams of Fangji, 20 grams of Qianzi, mixed with the end of the study. Pigs weighing less than 50 kg each 10 kg 20 g each and above 50 kg each 20 kg 35 g each, twice a day for 7 days.

Prescription 6: 10 calcium gluconate tablets and 10 cod liver oil capsules once a day for 5-7 days. At the same time, 10 ml of procaine was injected intramuscularly on one side, and 20 ml of vitamin glue calcium was injected on the other side, twice a day for 3 days.

No estrus, multiple mating do not match.

The sub-health endocrine imbalance of sows leads to many problems of non-estrus and repeated mating in sows. the key to raising sows is to make sows in time for postpartum estrus, multiple births and high yield, so as to maximize their potential fecundity and improve the economic benefits of pig breeding. Some sows did not see oestrus for a long time after delivery, which not only increased the feeding cost, but also caused the waste of manpower, feed and enclosure.

1. The cause

01. The ovary is still

02. Endocrine imbalance, when the content of prolactin in sows is very high, the amount of estrus can not rise, when the amount of milk in sows is very low, the body will secrete more prolactin to stimulate milk secretion, so that after weaning, estrus will be delayed or not obvious. Sows with good lactation ability are more likely to be in estrus than those with poor lactation ability as long as they are properly nourished.

03. Body fat is not enough. If the sow loses too much weight during lactation, the sow will not be in estrus after weaning. Energy intake should be increased and feeding should not be restricted.

04. Multiple mating is not good enough.

It is generally thought of as hysteritis or vaginitis, but in fact there is a potential and neglected factor-mycotoxin. Mycotoxin acts like estrogens, all sows have estrus, but when the estrogens in sows are too high, the sows can't get pregnant, so they don't deserve it all the time.

2. Take measures

Maintain balanced nutrition

Maintaining balanced nutrition and proper body condition is an important basis for normal estrus breeding of sows. Excessive obesity in sows can easily lead to endocrine disorders, ovarian fat infiltration, resulting in non-estrus. For such sows, we should increase the amount of green feed, increase the amount of vitamins, reduce the energy level of diet or reduce the amount of feed, and strengthen exercise.

Due to lack of nutrition or pregnancy, lactation consumption, low nutrition level and other too thin can also cause sows not to be in estrus. For such sows, the addition of vitamins, protein and energy should be increased, and the amount of feed should be increased to improve the nutritional level.

Improve feeding management and strengthen sports

Many pig farms are limited to tight enclosures or because of convenient management, many weaned sows are grouped together for management. It is common to see mutual interference due to pig bites, climbing, scrambling for troughs and so on. This management method affects estrus due to increased physical consumption of sows. In view of this situation, it is best to raise sows in a single circle.

Intermittent weaning and early weaning

During the lactation period, reducing the number of day and night lactation of piglets can promote oestrus of sows. The piglets of 3 weeks after birth were breastfed every 4 hours, and the piglets of 4 weeks old were fed twice a day, and the sows could be in estrus after about 1 week. In order to make the sows estrus early and shorten the lactation period, the piglets with good feeding conditions can be weaned at the age of 4 weeks and 5 weeks, and can be in estrus about 1 week after weaning. When the number of lactating piglets of sows is too small, it can be carried out to merge the litter, and the sows that do not undertake the task of nursing piglets can be in estrus early.

Induce estrus

In response to boars' courtship sound, smell, nose touching and climbing, sows are the most sensitive to hearing and smell, and seductive estrus is based on this sexual behavior between boars and sows. Specific methods can use boars to chase or climb across sows every morning and evening, or non-estrous sows can be kept in a boar pen to promote oestrus ovulation.

Breast massage

There are two kinds of surface massage and deep massage. The method of surface massage is repeated stroking on both sides of each row of breasts, and the stimulation produced secretes oocyte-stimulating hormone through the anterior pituitary caused by the sympathetic nerve, which promotes sows to be in estrus. The method of deep massage is to rub five fingers around each breast (not pinch the nipple). The stimulation caused by the parasympathetic nerve causes the anterior pituitary to secrete luteinizing hormone, thus promoting follicular ovulation. The method of breast massage is: after feeding every morning, surface massage for 5 minutes and deep massage for 10 minutes; after finding sows in estrus, change to surface massage for 5 minutes and deep massage for 5 minutes.

Drug aphrodisiac

One is hormonal aphrodisiac: use it carefully

The commonly used hormones are anterior pituitary gonadotropin, chorionic gonadotropin, pregnant horse serum gonadotropin, triad hormone and so on. Gonadotropin in anterior pituitary contains oocyte maturation hormone (FSH) and luteinizing hormone (LTH), which has a significant effect on estrus and ovulation in sows. Two days before the arrival of estrus in sows, the drug was given for 2 days, with an intramuscular injection of 500 units for 2 days. Chorionic gonadotropin was injected intramuscularly with 1000 units per pig.

Second, traditional Chinese medicine is an aphrodisiac.

Prescription 1: Angelica 15 g, Chuanxiong 12 g, Paeonia lactiflora 12 g, cumin 12 g, black medicine 12 g, Cyperus roxburghii 15 g, tangerine peel 15 g, liquor 100 ml. Take it twice a day after frying, and add 25ml of liquor each time.

Prescription 2: 30-50 grams of moon grass, 30-50 grams of motherwort, 20-40 grams of Angelica sinensis, 20-30 grams of red orchid, 30-50 grams of Herba Epimedii. Take it internally after frying.

Disease prevention and treatment

For sows with postpartum anestrus caused by hysteritis or vaginitis, the following methods can be used for prevention and treatment:

Prescription 1: 30 ml of 25% hyperosmotic glucose solution, adding 80-1.6 million units of penicillin, half an hour after the sow was injected into the uterus before breeding.

Prescription 2: sodium chloride 1 g, sodium bicarbonate 2 g, glucose 9 g, distilled water 100 ml (sterilized and then added sodium bicarbonate). The drug was injected into the uterus of sows for half an hour, adding 80-1.6 million units of penicillin and 0.5g of streptomycin into the uterus of sows.

Timely elimination

The situation that sows should be eliminated:

01. Prolong the first estrus: 270 days, weaning to estrus: 30 days

02. The average results of the pig herd are as follows: 3-5 cumulative production: less than 26, 5-7 total: less than 25

03, there are many stillbirths: 6 when the old sows give birth to more than 2 times in a row

04. Habitual return: 2 times in a row, with a total of 3 times

05. The performance of aged sows is lower than that of parturient sows, but it is temporarily retained when the number of litters is small.

06. Sows with poor limbs, sows with weak boar support during mating, and sows that are seriously left behind in the competition.

07. When more than 3 weak babies (within 1kg) were delivered for 2 times, the survival rate was low.

Hypothermia

Clinical hypothermia often occurs, especially in winter, do not have a fever, do not eat.

1. Symptoms of hypothermia

01. Sows sometimes appear low after pregnancy, often at 37.5 ℃.

02. Without food, you can drink water and get cold at the ends of your ears and limbs.

03, thin, rough coat, muscle trembling, conjunctiva pale, unwilling to exercise, lying in love.

2. Etiology of hypothermia

01, often in the cold season: do a good job of sow heat preservation in winter, make a good cushion to prevent the sow from spending the winter on the cement floor, and guard against the thief wind on the leaky floor.

02. Due to poor feeding and management during pregnancy or postpartum, malnutrition in sows and calorie imbalance in the body

03, sudden change of weather, cold and other stress factors and physical weakness are the inducements of the disease.

3. Prevention and treatment of hypothermia

01. Intramuscular injection of 0.1% epinephrine 1-3ml and Anna plus intramuscular injection of 2-10ml, once daily

02. Injection of astragalus polysaccharides or cell transfer factor and interferon

03. Oral brown sugar water, or intravenous injection of 10% glucose 300-500ml, plus 10%Vc5ml, once a day

04. Drinking water: electrolytic multidimensional + glucose + astragalus polysaccharides, 7 days

Raise nutrition standards, strengthen scientific management, and remove stress factors

The pigsty shall be kept clean, dry, warm and ventilated.

Dystocia

1. Causes of dystocia

01. The umbilical cord of pigs is shorter than the uterine horn of sows, so in the late 1/3 stage of delivery, because the umbilical cord has not been discharged, if the sows are anemic, tired and unable to contract, the piglets cannot be excreted in time, the piglets will die of asphyxiation within 5 minutes.

02. Heat stress

03. Anemia or disease.

2. Prevention of dystocia

01. Increase the nutrition of sows and prevent anemia

02. Excellent organic iron was added to sow feed to increase the abdominal contractility of sows.

03. Reduce heat stress and the content of crude fiber in feed

04. Pay attention to the disinfection of delivery house.

In case of dystocia, the fetal position should be corrected and proper midwifery should be carried out.

The placenta doesn't fall off.

Sows postpartum weakness, postpartum weakness, postpartum low body temperature, affected by diseases such as blue ear disease is easy to cause placenta retention. The main cause of the disease is that the junction of placenta and uterus is not mature and can not be detached at the right time. In addition, when the sow is in labor, it is attacked by cold wind, resulting in blood duct occlusion or placenta retention due to fetal size. Clinically, it can be treated with some traditional Chinese medicine or uterine suppository. (source: official account of Dr. Kang)