Guide to how to breed pigs and how to manage them (part 10)

Preface

Preface Foreword

Danyu pig is famous for its high yield, but due to the challenges of pig farm construction, feeding management and many other aspects, the production performance of Danyu pig in China has failed to meet the expectations, but the popularity of Danyu pig in China's pig industry is still getting higher and higher. Pig Translation Hall has specially collected a series of materials related to Danyu, and is currently reproducing the Danyu breeding Management Manual produced by the Danish Pig Research Center jointly launched by Hi Meat Technology, Yinglian Feed and Huayang breeding Pig.

Editor's words Editor\'s Note

Breeding is the beginning of a new round of production, and the quality of breeding will directly affect a series of key KPI, such as conception rate, delivery rate, litter size, weaning number and so on. Therefore, the correct management of the breeding house is helpful to improve and maintain the high and stable yield of sows. This manual explains in detail the various techniques of checking and breeding under different production modes, many of which are illustrated and can be directly used as SOP.

18. Scanning pregnancy test technique

SCANNING TECHNIQUE

18.1

18.1 good and regular pregnancy identification is a scan

Good And Systematic Pregnancy Control Is Done By Scanning

All sows were scanned on the 24th day.

All sows are scanned at day 24.

Remember to scan the sows in the sick pigsty.

Remember to scanne sows in the hospital pen.

Staff should pay attention to the arms, hands, knees and toes not to be squeezed by the sows in the pen.

Be aware that your arms, hands, knees and toes don't get squeezed in the inventory if the sows are in boxes.

The probe of the scanner is coated with a coupling agent and placed in the groin.

The scanner head is applied gel and is placed in the groin.

Move the probe slowly until a clear image of the embryo appears.

Lowly move the scanner head around until there is a clear picture of the fetus.

If the image is blurred, apply more couplers.

If the image is blurred, apply more gel.

At least 3 different embryo sacs must be found before pregnancy can be judged.

Only the discovery of at least 3 distinct fetal bladders is a sure sign of pregnancy.

If the scan result is uncertain, mark the sow and scan again within a star period.

If you are unsure of the diagnosis, then mark the sow, and scan again within a week.

A minus sign should be marked on the back of the empty sow and transferred back to the breeding shed.

Empty sows are marked with a minus sign on the back and are moved back to the mating unit.

If the delivery rate is less than 85%. Another scan should be performed at the 6th week of pregnancy.

If the farrowing rate is below 85% it is recommended to scan a second time in 6th week of gestation.

18.2

Error

Errors

The most common error in scanning:

The most common error when scanning is:

Empty sows were scanned as pregnant sows

An empty sow is being scanned pregnant.

The dark spot is regarded as an embryo because of the rush of time.

Hurry, where a dark smudge is assessed as a fetus.

If one side of the sow is covered by a bladder filled with urine, scan on the other side.

A fifilled urine bladder covers the embryos-try the other side.

Confuse cysts with embryos.

Cysts can be confused with embryoss.

Pregnant sows are scanned as empty sows

A pregnant sow is scanned empty.

There were fewer embryos and were scanned only once on one side of the sow.

A sow with few embryos with only one scanning on one side.

Sows were scanned less than 24 days after mating.

A sow, which is mated less than 24 days before the scan.

18.3

Supplementary note: scanning technology

Additional Comments: Scanning Technique

Empty sows with cysts. This sow will never get pregnant.

Scan of empty sow with cysts. This sow will never be pregnant.

A sow with an accessory ovarian cyst. This sow can get pregnant.

Scanning of sow with one paraovarian cyst. This sow could get pregnant.

Scanning the sows on the 24th day of mating, the large embryo sac can be easily seen.

Scans day 24. Large embryos bladders which are easy to see.

Ultrasonic image of position 1.

Ultrasound image position 1.

Ultrasonic image of position 2.

Ultrasound image position 2.

The ultrasonic image of position 3.

Ltrasound image position 3.

The ultrasonic image of position 4.

Ultrasound image position 4

The ultrasonic image of position 5.

Ultrasound image position 5

19. Use boars for pregnancy identification

USING THE BOAR FOR PREGNANCY CONTROL

19.1

19.1 in the pregnancy house, the task of the boar is to identify the estrus.

In The Gestation Unit The Boars Job Is To Make Heat Control

Estrus identification can be done through the following:

Heat control can be achieved by:

Let the boar walk on the observation passage in the pregnancy house. Sows in estrus will approach the boar.

The boar walks around on the inspection path in the gestation unit. The sows that are in heat, will seek out for the boar.

When putting boars into the sow herd, pay attention to observation.

The boar is in the group under observation.

A monitor is installed in the boar house to detect whether the sow has come into contact with the boar and the frequency of contact.

The boar is housed in an enclosure with a boar detector which detects if the sow visits the boar andhow often.

The boar must change the pigsty once a week to keep it fresh.

Boars must change pen every week to maintain their novelty value.

Boars need to be fed correctly.

The boar must be fed properly.

For a good boar, there are the following requirements:

For a good boar there are following requirements:

Boars must be active and sexually active.

He must be active and virile.

Boars must be sociable and friendly.

He must be sociable.

Boars must have a good physique.

He must have a good constitution.

The boar should not be too big, or it will frighten the little sow.

He must not be too big, so he scares the small sows.

Boars must be vaccinated correctly.

He must be vaccinated proberly.

Remember, no matter what method is used, boars can only find sows with obvious estrus.

Remember, whatever methods, the boar can only fifind the sows that show oestrus.

The effect of boar will not be obvious, if

The boar has little effffect if.

Boars are always with sows.

The boar always goes together with the sows.

The boar is too intense and has been chasing certain sows in the pigsty.

The boar is too violent and chases certain sows in the pen.

The temperament of a boar is uncertain.

The boar is unpredictable.

The boar is listless.

The boar is lethargic.

A good boar in a barn with good conditions.

Nice boar with good housing conditions.

Boars are interested in sows.

Boar seeks sow.

An active boar.

An active boar.

Lazy boar.

An indolent boar.

19.2

Supplementary note: use boars for pregnancy identification

Additional Comments: Using The Boar For Pregnancy Control

When the boar walks in the pregnancy house, carefully observe the behavior of the sow. Sows that are interested in boars and show signs of estrus should be marked and transferred to the breeding shed.

When the boar is taken around the gestation unit, the sows' behavior should be observed carefully. Sows showing interest in the boar and shows signs of oestru, is marked and moved to the mating unit.

It is not recommended to keep boars and pregnant sows in the same enclosure. It is impossible for a boar to mate with all the estrus sows, nor can it cause all the oestrus sows to show obvious symptoms of estrus. As a result, identification becomes difficult.

It is not recommended to house the boar in the pen with the pregnant sows. The boar will not necessarily mate all the returners and inspection will not detect all the returners. The control will therefore become diffiffifficult.

If the boar is placed in a cage with monitors, there are specific requirements for the enclosure. Boars should be able to see other sows. To ensure that the boar does not catch cold, the pigsty must have padding or even install an insulation cover. The sow's contact with the boar will be automatically recorded by electronic devices, but there is no guarantee that all estrus sows will come into contact with the boar.

If the boar is housed in a boar detector pen there are certain requirements for the pen layout. The boar should be able to see other animals. It should be ensured that the boar does not freeze. Therefore, the pen must be properly bedded maybe with a cover. Sows that seek out the boar are recorded electronically. There is no guarantee that all oestrus sows will contact the boar.

Boars have to change places once a week to keep them fresh. The boar copulates a sow every 14 days, which ensures that it does not lose its libido.

The boar must change place weekly, so he preserves = novelty effffect. The boar should every 14 day be allowed to mate a sow so he does not loose interest.

The boars are fed according to the following table:

A boar is fed according to the following instructions:

Before boars come into contact with sows, they need to be vaccinated with the same basic vaccine as backup sows (porcine parvovirus, porcine erysipelas, etc.). Then it will be vaccinated about 2-2.5 times a year, like a parturient sow.

Before the boar comes in contact with the sows, he should have received the basic vaccines like the gilts. (PPV, erysipelas, etc.) Then he should be vaccinated as sows-approx. 2-2 times annualy.