General Dog History

Nor are their habits different. The wolf's natural voice is a loud howl, but when confined with dogs he will learn to bark. Although he is carnivorous, he will also eat vegetables, and when sickly he will nibble grass. In the chase, a pack of wolves will divide into parties, one following the trail of the quarry, the other endeavouring to intercept its retreat, exercising a considerable amount of strategy, a trait which is exhibited by many of our sporting dogs and terriers when hunting in teams.

A further important point of resemblance between the _Canis lupus_ and the _Canis familiaris_ lies in the fact that the period of gestation in both species is sixty-three days. There are from three to nine cubs in a wolf's litter, and these are blind for twenty-one days. They are suckled for two months, but at the end of that time they are able to eat half-digested flesh disgorged for them by their dam--or even their sire.

We have seen that there is no authenticated instance of a hybrid between the dog and the fox. This is not the case with the dog and the wolf, or the dog and the jackal, all of which can interbreed.

Moreover, their offspring are fertile. Pliny is the authority for the statement that the Gauls tied their female dogs in the wood that they might cross with wolves. The Eskimo dogs are not infrequently crossed with the grey Arctic wolf, which they so much resemble, and the Indians of America were accustomed to cross their half-wild dogs with the coyote to impart greater boldness to the breed. Tame dogs living in countries inhabited by the jackal often betray the jackal strain in their litters, and there are instances of men dwelling in lonely outposts of civilisation being molested by wolves or jackals following upon the trail of a bitch in season.

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