. Common diseases of farm animals. Veterinary medicine. DETERMINING THE AGE OF ANIMALS 189 In determining the age of the different domestic animals by the development and appearance of the teeth, most of the attention is given to the lower incisor teeth. Up to the fifth year, the age of the horse or ox can be easily determined by the eruption and replacement of the incisors. At one year of age the colt has a fully developed set of temporary incisors. The ruminant's incisors at this age all show wear. The tiu0-year-old colt shows a well- worn set of incisor teeth, and the ruminant at this age h
. Common diseases of farm animals. Veterinary medicine. DETERMINING THE AGE OF ANIMALS 189 In determining the age of the different domestic animals by the development and appearance of the teeth, most of the attention is given to the lower incisor teeth. Up to the fifth year, the age of the horse or ox can be easily determined by the eruption and replacement of the incisors. At one year of age the colt has a fully developed set of temporary incisors. The ruminant's incisors at this age all show wear. The tiu0-year-old colt shows a well- worn set of incisor teeth, and the ruminant at this age has replaced the nippers or centrals. The third, fourth and fifth years are indicated by the replacement of the temporary nippers, dividers and comers in the horse, and the first and second dividers and corner teeth in ruminants. In the horse the permanent nip- pers are full gro\^Ti and in wear at three years of age; the permanent dividers are full grown and in wear at four years of age; and the per- manent corners are full grown and in wear at five years of age. The table surfaces of the incisor teeth of a five- year-old horse show different degrees of wear. At this period in the ani- mal's age, the nippers have been in wear two years, the dividers one year, and the corners are beginning to show wear. In rumi- nants, all of the chisel-shaped table surfaces of the incisors show considerable wear when the animal is five years old. Fig. 52.—Longitudinal section of incisor tooth: (A) cup; (B) cement; (C) enamel; (D) ivory; and (E) pulp cavity. (After Huidekoper.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Craig, Robert Alexander, 1872-. Philadelphia & London, J. B. Lippincott company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1915
