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How to identify the age of sheep?
Age identification is the basis for other assessments. The performance, body posture, and identification criteria of mutton sheep are different in different ages. The more reliable age identification method is still dental identification. There are certain rules in the growth, shape, loss, wear and looseness of teeth. Therefore, people can use these laws to accurately identify ages. There are 32 teeth in the adult sheep. There are 12 maxillary jaws, 6 on each side. The upper jaw has no incisors, and the lower jaw has 20 teeth. Among them, 12 are molars, 6 on each side, and 8 are incisors, also called incisors. The use of teeth to identify the age is mainly based on the occurrence of the mandibular incisor, replacement, wear, fall off to judge. The lamb is born with 6 milk teeth; about 1 month old, 8 milk teeth grow up; around 1.5 years old, the crown teeth of the teeth have a certain degree of wear, and the pincers fall off, and the first pair of permanent grows along with the original part of the shedding. Teeth; at the age of 2 years, the middle teeth are replaced, and the second pair of permanent teeth are grown; at the age of 3, the fourth pair of milk teeth are replaced with permanent teeth; at the age of 4 years, the chewing surfaces of the 8 incisors are relatively straightened. At the age of 5, you can see that there are obvious tooth stars on individual teeth, which shows that the crowns of teeth have been basically worn and the pulp is exposed; at the age of 6 years, the teeth have been ground to the neck, and there are obvious gaps between the incisors; 7 At the time of the year, the gap was larger and there was a dew-hole phenomenon. In order to facilitate memory, summed up the jingle: One year and a half, in the teeth; to two years old, for two pairs; two and a half years, three pairs of full; three years old, teeth change; four grinding flat; five teeth star; Sewage; seven exposed holes; eight loose; nine teeth; ten exhausted.