Cows grasp three elements
The requirements for cows are generally healthy, normal, milk-producing and young (long-term use). When choosing, you must grasp three elements.
Production performance The production performance of dairy cows mainly includes milk production and milk fat percentage. Milk production is a measure of the actual milk production capacity of a cow and is also the most important economic trait of dairy cows. Milk fat percentage is an important indicator for assessing milk quality.
Under normal circumstances, the cow is required to produce one year's worth of milk. In addition to 60 days of dry milk, it should generally produce 305 days of milk. If the milk production is less than 305 days, it is not a good cow.
Although milk was produced within 305 days, some milk production was high and some milk production was low. The comparison of actual milk production alone cannot fully reflect the advantages and disadvantages of cattle. Because the milk fat percentage of each cow is different, the level of milk fat percentage is an important indicator of the quality of milk. According to the regulations, the fat content of 4% of the standard milk, if less than 3% of the known as low-fat milk, the economic value of low-fat milk is lower than high-fat milk. Even if the amount is large, the fat content is low, which still cannot improve economic efficiency. Therefore, a cow with good production performance not only has a high milk yield, but also has a high milk fat content.
Appearance The appearance of a good-quality black-and-white cow should have the following advantages: tall body, long and deep body, short and shiny hair, strong limbs, solid footing, hoof-shaped body, handsome head, and good neck binding. Large belly without sagging, large breasts without sagging, good adhesion, elasticity, obvious milk veins, moderate nipple size, vertical, columnar, well-distributed, fast under the milk.
Health Checks Health checkups are important when selecting cows. First of all, to understand whether there is tuberculosis and brucellosis. Because these two diseases are zoonotic diseases, the harm is great. When purchasing cows, you must ask the seller to show the quarantine certificate for the two diseases. If there is no quarantine certificate, the veterinarian must be quarantined and not purchased. Second, observe the nutritional status of dairy cows from the outside, at least have medium nutrition levels, shiny skin, skin without dermatitis and parasitic diseases. The appetite is good, the urine is normal, the energy is full, and the eyes are big and divine. Third, check the breasts. Because the breast is an important organ for milk production, it is important that its structure and function are normal. If the breast is damaged, the milk production will be greatly reduced. Some nipples, because the bacteria in the breast has not been completely eliminated, but also endanger other milk areas, causing secondary mastitis. Therefore, when choosing cows, you must pay attention to these issues. In addition, it must also be noted that the breasts must be symmetrical, soft and without significant sagging, and that the pre-milk area should be slightly larger than the posterior milk area. Fourth, pay attention to the inspection of reproductive performance. When selecting cows, to find out whether there is a fetus, please check with the animal husbandry and veterinary technicians. For aboriginal cows, understand why they are not pregnant. If dairy cows are suffering from obstetric diseases, they are not worthy of the species and should not be purchased.
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