TEETH OF THE DOG. 349 
lobules on the edges wear away and are flattened (see Figs. 3 and 
4). The teeth are developed in two sets; the first, called milk- 
teeth, showing themselves through the gums about a fortnight or 
three weeks after birth, and lasting till the fifth or sixth month, - 
when they are displaced by the permanent set, the growth of which 
is accompanied by a degree of feverishness which is often mis- 
Fig. 1. 
taken for distemper. The dog’s teeth should be beautifully white, 
if he is healthy and well reared, and until the third year there 
should be no deposit of tartar upon them ; but after that time they 
are always coated with this substance at the roots, more or less, 
according to the feeding and state of health. The dentition of 
the dog varies so much that his teeth form no reliable guide to 
his age. 
