Pay attention to the purchase of black and white dairy cows

Look at your appearance. The improved black and white dairy cow has a tall physique, developed rear drive, and an inverted triangular body; most of the mammary veins are curved and the breasts are well developed; the coat color is a well-defined black and white flower piece, with white stars on the forehead, and white on the lower limbs, abdomen and tail broom.

Second, look at milk production. The lactation period of improved black and white dairy cows is 305 days, the milk yield is generally more than 5000 kg, and the daily milk yield is not less than 15 kg.

Third, look at the nasal mirror. Healthy bovine nose mirror is moist, with water droplets. Diseased cattle are cyanotic and feverish under nasal endoscope.

Fourth, look at rumination. The ruminating of healthy cattle is normal, except for estrous cattle, there is no disappearance of ruminating symptoms, and the ruminating of estrous cattle does not stop completely, but pain, hunger and disease will cause the cessation of rumination.

Five, look at the feces. The feces of cattle fed in normal houses are yellowish brown, while those of grazing cattle are yellowish green. If there are feed particles or stench in the feces, it indicates that there is a hidden danger in the way of feed processing or cow digester.

Six look at feeding. The appetite of healthy cattle is good, the intake is normal, the appetite of sick cattle is decreased, and the phenomenon of picky eating is serious.

Look at mastitis. The examination method is: titrate fresh milk with 75% alcohol (medical sterilized alcohol). If there is milk hanging cup or precipitation, the cow has mastitis or recessive mastitis, this kind of cow should not be selected.

Look at endometritis. Cattle with endometritis often have clear, white or yellow purulent mucus on the outer wall of the vagina, which is generally not suitable for breeding and conception. Try to choose healthy young cows when buying cows.