The male dog will bite the female dog because 1, the male dog and female dog because of the fight for food, territory, so the male dog will bite the female dog. 2, the male dog and female dog do not see eye to eye, the smell of each feel uncomfortable, so they will fight. 3, may be the male dog playing with the female dog, just seems to be fighting, in fact, they nibble between the strength of very light.
