58 The Diseases of Animals 



The temporary incisors in cattle are erupted, or cut. 

 as follows: The central incisors or nippers are up at 

 birth, the internal lateral at one week old, the external 

 lateral at two weeks, and the corner incisors at three 

 weeks old. They are replaced by permanent incisors 

 approximately as follows, though they vary much more 

 than in the colt : The central incisors are replaced 

 at twelve to eighteen months; the internal laterals at 

 about two and a half years ; the external laterals at 

 three to three and a half years; and the corner incisors 

 at about three and a half years. 



In horned cattle, a ring of the horn makes its ap- 

 pearance at three years of age, and a new ring is added 

 annually thereafter. 



COLOR OP HORSES 



In selecting horses, the color is largely a matter of per- 

 sonal preference; but, other things being equal, horses 

 of decided dark color are preferable. A blood bay, 

 mahogany brown, dark chestnut and black are usually 

 given preference in the order named. The objection to 

 white or light-colored horses is the difficulty in keeping 

 them clean, the looks of light hair upon dark clothing 

 when the animals are shedding their coats, and the 

 fact that such animals are subject to melanotic tumors 

 of the skin. Horses having white noses and muzzles are 

 liable to inflammation of the skin in this region when 

 turned out to pasture. A color that will not bleach 

 when exposed to the sun or weather is desirable. 



A matched team is made up of horses of the same 



