How to buy cows?

Introduction: how to choose this black and white dairy cow? In order to make it easy for cattle farmers to remember, we attribute cattle selection technology to "seven looks" At present, there are many kinds of dairy cattle in the world As far as China is concerned, there are mainly Chinese black and white dairy cattle, juanshan dairy cattle, Swiss dairy cattle, etc China's black and white dairy cow has a history of more than 100 years It originated in the Netherlands After decades of cultivation, it was identified and accepted by the Ministry of agriculture, animal husbandry and Fisheries and the Ministry of reclamation in 1986, and was officially named "China's black and white dairy cow" Chinese black and white dairy cattle belong to high input and high yield varieties, which have the characteristics of high milk yield, rough feeding tolerance and wide adaptability According to the cultivation practice of Zhuolu County, it is very suitable for raising this kind of dairy cattle How to choose this kind of black and white cow? First of all, look at its appearance characteristics, then its production performance But don't forget to ask for the pedigree, epidemic prevention and quarantine certificate of the cow In order to make it easy for cattle farmers to remember, we attribute cattle selection technology to "seven looks" Look at the appearance: black and white dairy cows are tall and strong, with good combination of all parts and well-balanced body Generally, the adult cow has a body height of over 130 cm, a body length of over 170 cm and a body weight of about 500-700 kg The head, neck, scapula and hind legs have clear edges and corners, obvious outline; the skin is thin and elastic, capillary and shiny; the main color is black and white flowers, with clear boundaries Second look at the breast: the breast is the most important organ of the cow We must pay attention to the selection of breasts when selecting cows Attention should be paid to the size, shape and quality of the breast High yield cows should have large breasts that extend forward to the abdomen, and back to the thighs and protrude behind the body The four breast regions were well developed, the papillae were of moderate thickness and length, cylindrical shape, wide apart, and the breast base was higher than the hock joint Generally, the breasts of high-yield cows are abnormally swollen and elastic before milking After milking, it is obviously reduced and very soft, forming many wrinkles If the breast is still hard after milking, it is called "flesh breast" No matter how large the breast is, the milk production will not be high Generally speaking, we should choose cows with large changes in breast volume before and after milking Secondly, the mammary vein should be thick and curved, the breast well should be large and deep, the breast skin should be thin and fine, and the coat should be short and sparse Third, the head, neck and shoulders: the head is narrow and beautiful, with beautiful outline, large nostrils, wide nostrils, wide mouth, deep mouth crack, obvious boundary, round eyes, big and bright eyes, and small, dull or fierce cattle are not optional The angle should be slender, dense and lubricated, bent forward and upward The neck should be long and thin, natural and good combination with head and shoulder The shoulder should be close to the body and arm with proper inclination, compact and powerful Fourth, chest, abdomen and waist: chest volume is a sign of the development of heart and lung The chest is wide and deep with large volume, indicating good development of heart and lung Narrow chest and shallow chest are not recommended Back and waist should be flat, straight, long and wide Concave back, carp back, wave back and narrow back are serious defects Fifth, the rump Department: the rump minister's wide flat or slight inclination is a sign of developed hindquarters The reproductive organs of cows should be large, fat and completely closed 6 Hooves: solid and powerful limbs, upright hooves, no "O" or "X" legs, nearly round hoof bottom Seven look at teeth and angle wheel: 1.5-2-year-old deciduous teeth grow permanent teeth, 2.5-3-year-old inner middle teeth, 3.5-4-year-old outer middle teeth, 4.5-5-year-old corner teeth, 6-year-old tong teeth are rectangular, 7-year-old tong teeth are triangular, 8-year-old tong teeth are quadrilateral or non equilateral, 10-year-old tong teeth gradually become round The formation of horned rings, as of tree rings Therefore, the age of dairy cattle can be roughly determined according to the growth characteristics of the angle wheel The age of cattle can also be roughly judged according to the law of tooth growth and loss It is suggested that in addition to the pedigree, epidemic prevention and quarantine certificate of the cow, the farmers should carefully observe the appearance of the cow, understand the period when the cow is in lactation, and see the milk yield However, it's better to hire professionals to check for you and guard against being cheated, causing unnecessary economic losses and mental pressure.