The reproductive ability of dogs
Reproductive capacity
Dogs have reached sexual maturity before 1 year old, showing estrus (commonly known as "naughty dog"), but the time of physical maturity varies according to the breed of dog. Generally speaking, small dogs mature earlier than large dogs. For Beijing dogs, Xishi dogs and other small dogs, it is appropriate to breed and conceive in the second estrus (about 12-14 months old), while Great Dane dogs and black shellfish dogs are better after 18 months of age, because they have reached maturity at this time.
The highest pregnancy rate occurs on the eleventh to thirteenth day of the bitch's estrus. After conception, the bitch gave birth after 64 ±4 days of pregnancy, and the lactation period was about 45 days after delivery. The average litter size per litter is 4-6, which varies from breed to breed.
Dystocia mainly occurs in the following situations: the fetus is large, especially when only one fetus is pregnant; when the bitch is not mature, the pelvic mouth is narrow; the bitch is mainly carnivorous, and the bone development is poor; the fetal position is not correct; the bitch's physique is weak, uterine contraction is weak; not to the normal delivery time, preterm delivery by external stimulation, and so on. Sometimes, the female dog of the small dog is too small, and the male dog is too large, which is also one of the factors causing dystocia. 7-14 days after delivery, the puppies opened their eyes. Puppies find their nipples by their sense of smell, while bitches identify their puppies by their anger. Seven days after delivery, the growth and development of puppies enter a rapid period, which is easy to cause or aggravate the postpartum calcium deficiency of bitches, such as wheezing, high fever (about 40 ℃) and convulsions, which should be supplemented in time.
- Prev
Causes and prevention of dog hair loss
Pet dog hair loss refers to the local or systemic hair pathological shedding, often accompanied by other symptoms. Hair loss not only affects the dog's aesthetics, but may also spread diseases to the owner. Causes of hair loss and performance 1, scabies mite disease: caused by scabies mite or demodex mite. Sarcoptes occur mainly on the head (nose, orbit, auricle and its root), sometimes also in the chest, abdomen, armpit, thigh inner and tail, and even spread to the whole body. The skin surface is flushed, with rash nodules, subcutaneous tissue thickening, and the skin of the affected part is often scratched.
- Next
Davidia involucrata blossoms like a flock of pigeons
Davidia involucrata, also known as pigeon tree, originally grows in cold mountain areas with an altitude of 1000 to 2000 meters above sea level. It likes shady, wet, slightly acidic or neutral soil. It is a national first-class protected tree species. It blossoms in spring and looks like pigeons, so it is named "pigeon tree". The Forestry Institute of Xiangfan City, Hubei Province, was introduced and cultivated in 1980, and now there are more than 200 plants, the largest of which is 13 meters high and 14 centimeters in breast diameter. On April 10, the 27-year-old Davidia involucrata is full of flowers, about 800, like a flock of pigeons dancing. Xiangfan Forestry Institute is located in Gulong scenery.
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?