Both sexes have anal scent glands and may scratch the ground after defecation. The micturition patterns differ in males and females. Apparently these reactions are primarily elicited by strange animals. As may be expected in a predatory animal, this sort of behavior is prominent. Fighting or its alternated pattern of running away occurs rather frequently.
Playful fighting is very common in young puppies.
There is a tendency to develop dominance under certain conditions, together with characteristic attitudes of dominant and subordinate animals. On the other hand, a well coordinated group of familiar animals may be strikingly peaceful and cooperative. The dog exhibits two interesting specializations of sexual behavior. One is the comparatively long period of heat in the female, usually including a week or more of preliminary behavior and approximately two weeks of receptivity. The other is the copulatory tie, as a result of which the male and female are attached together.