. Common diseases of farm animals. Veterinary medicine. DETERMINING THE AGE OF ANIMALS 191 indicate. In order to stand severe work the animal must be able to masticate the feed, and prepare it for digestion in the stomach and intestines. The degree of wear on the molar teeth may be indicated by the wear on the incisors. The general condition of the horse and his ability to stand hard work depend very largely on the condition of the table surfaces of the molars. It is very difficult to judge the age of horses that have de- formed mouths or that are in the habit of crib-biting, because of the ir
. Common diseases of farm animals. Veterinary medicine. DETERMINING THE AGE OF ANIMALS 191 indicate. In order to stand severe work the animal must be able to masticate the feed, and prepare it for digestion in the stomach and intestines. The degree of wear on the molar teeth may be indicated by the wear on the incisors. The general condition of the horse and his ability to stand hard work depend very largely on the condition of the table surfaces of the molars. It is very difficult to judge the age of horses that have de- formed mouths or that are in the habit of crib-biting, because of the irregularity in the wear of the incisors. When examining the teeth for the purpose of determining. Fig. 54.—Transverse section of incisor tooth: (A) peripheral cement; (B) peripheral enamel; (C) ivory; (D) central enamel; and (E) central cement. (After Huidekoper.) the horse's age, the shape of the incisors, the angle with which they meet and the appearance of their table surfaces should be observed. The teeth of young horses show more or less yellowish cement. At about seven years of age the anterior faces of the teeth are usually white, later a yellowish color. The teeth of middle-aged horses may be long, and in aged animals, narrow and short. The incisors meet at a more acute angle in old than young horses. The free portion of the incisor tooth is flattened from l^eipre to behind. At the level of the gums its two diameters are about the same, but the portion of the tooth imbedded in the jaw bone. 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: ., bookpublisherphilad, booksubjectveterinarymedicine, bookyear1919
