First, according to the shape of the breast
1, breast tightening type; breast tight little spherical, nipple short and small, inconvenient milking, low milk production.
2. Relaxation type: sagging breasts to sagging below the tarsal or tarsal section, short nipples and breast margins are not obvious, resembling a long bag. Although this type of breast has a large volume and a high milk yield, the goat is inconvenient to walk and is easily scratched by a tree shrew to cause inflammation of the breast.
3, round large: breasts plump and symmetrical, front extended to the abdomen, the middle stuffed between the two strands, behind the rear of the hind limbs, close to the abdomen, nipple size, slightly stretched forward, nipple and breast obvious Boundary, this is a more ideal type.
Second, according to the structure of the breast
High-yielding breasts are fine and thin, have no hair on the surface, or have a small amount of villi at the base. The touch is soft and elastic and there is no hard core inside. Breast enlargement before milking, significant shrinkage after milking, and many wrinkles on the surface. The glandular tissue is developed and there are few connective tissues. This kind of breast is called glandular breast. Low-yielding breasts have rough skin, lean meats, no elasticity, and hard cores. Breast volume changes little before and after milking, and there is little glandular tissue. This breast is called a fleshy breast.
Third, according to the shape of the milk vein
All milk veins are thick, long and bent, and the side branch vessels have more milking power and higher milk yield; if the veins are not developed, there is no obvious bending, and the side blood vessel branches are not high enough to produce milk.
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