How to judge the age of a cow by its teeth?

2020-12-11 13:40:22 dy 2

Cattle raisers buy cows for a lot of time, so in the process of buying cows, the identification of the age of the cow is an essential and important link. Then how to judge the age of the cow according to the teeth, then let’s talk about it. How to judge the age of a cow by its teeth.

Cattle raisers

Judging by appearance, by observing the appearance of the cow, you can have a preliminary estimate of the age of the cow, and judge whether it is an old cow, a young cow, a young cow or a young cow. For example, the head of the young cow is short and wide, the eyes are lively and energetic, the eyelids are thin, and the hair is smooth; the body is narrow, the limbs are higher, and the hindquarters are higher than the front. Generally, the young cow's coat length is short, the thickness is moderate, the skin is soft and elastic, the eyes are full, the eyes are bright, and the behavior is lively.

But the more accurate way to judge the age of a cow is to observe the birth and grinding of the front teeth. According to the order of birth, cow's teeth can be divided into milk incisors and permanent teeth (permanent teeth). The upper jaw of cattle has no incisors, only keratinized tooth pads. The lower jaw has 4 pairs of incisors, called forceps, inner middle teeth, outer middle teeth, and corner teeth from the middle to the outside. From the replacement and wear of the front teeth, the age of the cow can be roughly judged. It can be summarized as 2, 3, 4, 5 to see the tooth replacement, 6, 7, 8, 9 to see the grinding surface, 10, 11, 12, and 13 to see the bead point.

The cow's milk incisors (the teeth that grow after birth) are small and white, with obvious necks and large interdental spaces; the permanent teeth are large and thick, slightly yellow in color, neatly arranged, and close to each other. Generally, calves have 1 pair of milk incisors at birth, sometimes 3 pairs. The last pair of mammary incisors is born 5-6 days or about half a month after birth. At 3-4 months, all the mammary incisors have been long and semicircular. From the age of 4-5 months, the tooth surface of the mammary incisor gradually wears out. When the abrasion reaches a certain level, the mammary incisor begins to fall off and replace the permanent teeth. The water buffalo is about 3 years old, and the first pair of milk incisors of the scalper falls off at about 2 years old, and the first pair of permanent teeth, namely "pair teeth", will grow out, and one pair will be replaced every year, gradually changing from "four teeth", "six teeth" to " "Baya" (ie, "Qikou is also called Bianya"), generally buffaloes are about 6 years old, and cattle are about 5 years old.

After the cows have opened their mouths, the permanent teeth begin to wear sequentially. The wear surface gradually changes from a rectangular pattern to a black ellipse to a triangle, and the gap between teeth gradually expands until the root of the tooth is exposed and the permanent tooth falls off. The rectangular pattern that appears on the worn surface of the tooth is a "print". The water buffalo is about 7 years old, and the scalper appears "two seals" when it is 5.5-6 years old, and then wears one pair each year until the "eight seals". The buffalo is about 10 years old and the scalper is 8.5-9 years old. The water buffalo is about 11 years old, and the scalpers appear "two beads" when they are 9.5-10 years old, and so on until they reach "eight plants" (ie, "manzhu", also known as "laokou"). The buffalo is about 14 years old, and the scalper is 12.5-13 years old. The water buffalo is over 14 years old, and the scalper has reached old age over 13 years old, and has basically lost its service performance and reproductive performance.

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