What do you think of the age of the cow?

The growth, replacement and wear of teeth are regular, and the age of cattle can be judged according to the changes of their incisors, that is, according to the occurrence of deciduous teeth or the replacement of deciduous teeth into permanent teeth and the wear degree of permanent teeth. Let's take a look!

Identify age according to appearance

Appearance can only identify the young and old, but not the exact age. In general, the coat of young cattle is shiny, rough and moderate, the skin is soft and elastic, the eye pelvis is full, the eyes are bright, and the action is lively and powerful, while the old cattle are on the contrary. The standing posture of the limbs is incorrect, the coat is disorderly and without luster, the skin is dry, the eye pelvis is sunken, the eyes are dull, the rims of the eyes are wrinkled, and the action is slow. Buffalo in addition to the above changes, the coat color will become darker and thinner with age.

Identify age according to angular chakra

Horn rings, like tree rings, are usually formed due to lack of nutrition during the dry season of forage or during pregnancy. Every time a cow gives birth, a concave wheel is formed on the surface of the horn. Therefore, the number of angular wheels plus mating age is the age of the cow. But this is only accurate under normal circumstances, if the cow is empty, miscarriage, illness or nutritional imbalance, the depth, width and width of the horn wheel will not be the same, and often the boundaries are not clear, and more than one is formed every year. Therefore, only large and obvious angular wheels are usually calculated. Otherwise, it is easy to lead to judgment errors. Note that for breeding bulls with good breeding conditions, there is usually no horn wheel on the horn.

Identify age according to teeth

1. Opposite teeth: cow's deciduous teeth (that is, teeth grown after birth) are small and white in shape, with obvious necks and large tooth gaps. Permanent teeth (that is, new teeth replaced by deciduous teeth) are large and thick, yellowish in color, neatly arranged and close to each other. In general, the first pair of deciduous incisors grew out about half a month after birth, and 4 pairs of deciduous teeth grew evenly at the age of 4-5 months, and then gradually became shorter. The first pair of deciduous incisor teeth of buffalo and yellow cattle were about 3 years old and 1.5-2 years old respectively. Grow the first pair of permanent teeth, that is, opposite teeth, and then lose and renew a pair of teeth every year, gradually from 4 teeth, 6 teeth, to 8 teeth (Qi mouth), generally buffalo about 6 years old, yellow cattle 4.5-5 years old.

2. Tooth marks: after the cow's mouth, the permanent teeth begin to wear sequentially, the wear surface gradually changes from rectangular pattern to black oval and even triangle, and the gap between teeth gradually expands until the root of the tooth is exposed or even the permanent tooth falls off. the rectangular pattern on the worn surface of the tooth is imprinted. The buffalo is about 7 years old, and the yellow buffalo is 5.5-6 years old. According to this, one pair is worn out year by year until 8 seals. The buffalo is about 10 years old, and the yellow cattle is 8.5-9 years old.

3. Tooth beads: the black oval pattern on the worn surface of the teeth is "beads". The buffalo is about 11 years old, and the yellow cattle appear 2 beads when they are 9.5-10 years old, and so on until 8 beads (full beads, also known as the old mouth), buffalo full beads about 14 years old, yellow cattle full beads 12.5-13 years old. Buffalo over 14 years old, yellow cattle over 13 years old has reached old age, basically lost service performance, reproductive performance is also basically lost.