A look at breast milk should be large, good texture, good shape, good adhesion, that is, large breast volume, breast development, soft and elastic, four dairy areas developed well-proportioned, prolonged postoperative delay is not sagging, rounded square like a bathtub The best. The length of nipple should be 5~10cm. It is not convenient for milking too long or too short. The purpose of looking at the mouth is to determine the health status of the dairy cows purchased and to determine their age. Diseased cows have no appetite or appetite, while healthy cows have a strong appetite. Second, we must roughly determine the age of the cow by looking at the teeth. Third, look at the eyes of dairy cows with large eyes and bright, flexible and energetic, indicating that they are healthy and docile. Cows with "winking eyes" can usually be slowly pointed at the bull's eye with their fingers, and they can be checked by observing their reactions. The four-legged dairy cows must be well-preserved, have no bad postures, have a round and square shell, clean the forks, and have close symmetry between the inner and outer hoofs. The texture is firm, non-malformable hoofs, and no hocks. The cows in the usual condition of the five furs are: black and white flowers, clear flowers, short and dense hair, natural luster, soft skin, and elasticity. Six-cornered cows produce a single round of calf every time it is produced. Therefore, the number and the age of the cows can be judged by observing the number of angle wheels. Generally cows produce calves around the age of 2.5, one-child-year-old, so when the age of the cow is extrapolated, the number of rounds plus 2.5 will give the approximate age of the cow.
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