. Cyclopedia of farm animals. Domestic animals; Animal products. Fig. 438. The lower nippers of Fig. 439. Lower nippers at the colt at two years old. three years of age. Two and one-half to three years old.—At about two years and nine months to two years and eleven months the central permanent incisors will appear, and at full three years of age the outer part of the teeth and sometimes the inner, also, will be up and in wear. (Fig. 439.) The permanent incisors are larger in every way than the temporary or milk teeth. By this age, the intermediate temporary incisors have worn down and lost all
. Cyclopedia of farm animals. Domestic animals; Animal products. Fig. 438. The lower nippers of Fig. 439. Lower nippers at the colt at two years old. three years of age. Two and one-half to three years old.—At about two years and nine months to two years and eleven months the central permanent incisors will appear, and at full three years of age the outer part of the teeth and sometimes the inner, also, will be up and in wear. (Fig. 439.) The permanent incisors are larger in every way than the temporary or milk teeth. By this age, the intermediate temporary incisors have worn down and lost all or nearly all their cups. There will be a slight black indentation that can hardly be called a cup. In the lateral or corner teeth, the cups are greatly reduced. If the colt be a male, small caps are likely to be present or in the process of coming through the skin of the jaw. These are called tusks. Four years old.—At about three years and nine months, the intermediate incisors appear. At four years of age, they are fully up and in wear on the outside, and sometimes on the inside. (Fig. 440.) The central incisors show one year's wear, and the cups are not so deep as they were when the colt was three years old. The cups have nearly or quite disappeared from the lateral or corner temporary incisors, often nothing but a slight dark indenta- tion being left. The tusks, if any, have enlarged, but are still sharp at their points and flatfish on the inside. A side view of a four-year old mouth is shown in Fig. 441. Note that the crowns of the two temporary or milk teeth, one upper and one lower, come together closely over their entire sur- face, while the two permanent teeth do not meet at their posterior Fig. 440. Lower nippers at four years of age. Fig. 441. Side view of the teeti of a four-year-old horse. is full five years of age, the outer exterior parts of the teeth meet (Fig. 443), although almost one year of wear must take place before the lateral or corner tee
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