How do cows react when they want to have calves? I know. Tell me.

1. About half a month before labor, the breasts of pregnant cows began to get bigger. A few days before labor, the first two nipples can express honey-like milk, indicating that cows will calve in 3-5 days.

2. Changes of vulva: In the third trimester of pregnancy, the labia of dairy cows become soft, the folds become flat, the mucus plug that closes the uterine orifice begins to melt, and it flows out of vulva in a transparent way 2-3 days before labor. Collapse of both hips: during the pre-labor period 1-2 days, the pelvic ligament softened and relaxed, and the muscles on both sides of the tail root collapsed obviously, which was the main change in the pre-labor period.

3. Cows have obvious anxiety before delivery: when cows appear, they lie down, walk back and forth, keep looking back at their abdomen, don't eat or bark, and prepare for delivery.

This cow is in the estrus of mating. A month later, there was no estrus, the appetite increased, the fat feeling became longer and the fur was shiny, indicating that the cow was pregnant. Pregnant cows are gentle, cautious and like to be quiet. With the extension of pregnancy time, the abdominal circumference of dairy cows gradually increased, and the phenomenon of accelerated breathing appeared.

Extended data:

How to improve the survival rate of calves;

1. Promote cows to calve in the daytime. Cow calving is concentrated in April-May, mostly at night. Poor nursing makes calves calving for too long, which will lead to birth canal infection, reproductive tract injury and other diseases. At the same time, it can also cause fake death, weakness or cold in newborn calves. Practice has proved that letting cows eat at night can promote calving during the day.

At present, the common practice is to let the cows at the last 1 month of pregnancy eat at night, which can promote more than 70% cows to calve during the day. Calving in the daytime is easy to observe, which is beneficial to midwifery, can avoid the influence of adverse factors in winter, reduce obstetric diseases and improve the survival rate of calving.

2. Strengthen feeding management. After the cow is pregnant, it is necessary to strengthen feeding management and exercise properly. The milk production period is generally controlled at about 2 months, so as to promote the accumulation of nutrients in the body, restore physical strength and breast function, fully recuperate and ensure the smooth delivery of calves.

3. Do a good job in midwifery. The cow is about to give birth, so we should take care of it day and night. During delivery, clean and disinfect the vulva with warm water and Lysol water, dry the hindquarters with a wet cloth and wait for delivery quietly. Generally, cows can give birth by themselves without midwifery. If the fetal position is not correct and you can't give birth by yourself, you can carry out artificial midwifery.

General midwifery is: when the fetal head is exposed to the vulva, it is necessary to tear the fetal membrane in time to protect the perineum and labia and prevent the labia from tearing up and down. If the tail is in the right position, the fetus should be taken out quickly.

Generally, midwives bind their forelimbs (or hind limbs) with their hands or sterilized strings. The assistant pulls the operator's hands into the birth canal, inserts the mother's fingers into the squab, and holds the lower jaw. The operator and the assistant coordinate their actions and pull hard with the strength of the cow (alternating legs). The direction of force should be the lower back of the cow's ass until the fetus gives birth.

4. Strengthen calf culture. It is necessary to advocate "three-point distribution and seven-point education" and carefully care for postpartum calves. It is necessary to feed and supplement the calf according to the standard, ensure the normal development of the calf, and change the phenomenon of "being decent, looking out of shape, and finally being frozen."

References:

Niu-Baidu Encyclopedia