Problems should be minimal when a Rottweiler is raised from puppyhood with other pets. Introducing a new pet when there is an adult Rottweiler in the household should be done slowly and with care. Dog to dog aggression is influenced by the early socialization of puppies, their bloodlines and sex; males are less tolerant of other males than they are of females. Bitches may also be intolerant of other dogs. The Rottweiler is highly intelligent and trainable, and with perserverence, should be able to learn to co-exist peacefully with any pet you wish to introduce.

FAQs taken from American Rottweiler Club