First, look at the bull's eye identification. Immediately above the pupil of the pregnant cow's pupil, three particularly prominent upright blood vessels appear on the iris, the so-called pregnancy vessels, which fill up the surface of the iris and appear purple. The blood vessels on the iris of pregnant cows did not appear to be small.
Second, look at breast recognition. The breasts are swollen, the nipples are hard and straight, and are pregnant cows. The breasts do not swell and the teats are not hard and straight.
Third, look at oral recognition. Open the cow's mouth and look at the sublingual meat on both sides of the mouth. If it is bright red, it is a pregnant cow. If it is pink or pink, the cow is not pregnant.
Fourth, to see the tail identification. When the cow's tail does not sway, if the cow is covered and left or right tilted, the cow is pregnant. If the tail is covering the middle vertically, it means there is no pregnancy.
Fifth, look at milk identification. The milk that has been squeezed out by hand is honey-colored and has a paste-like shape. Most of the non-flowing milk is pregnant cows. If it is white, and if it is squeezed out naturally, empty cows will be born.
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