Dog behavior is determined by two factors: ancestry and training. All dogs, no matter how friendly and human-like they appear to be, are descendants of wolves. Like wolves, dogs have a pack mentality. Without this trait, dogs would not be the great pets we know them to be. Once a human family adopts a dog, the canine adapts to its new environment. Just as wolves must discover their roles within packs, dogs need clearly defined roles within their human families.

What Influences Dog Behavior?
Dogs and humans share several innate traits. Both are outwardly social, enjoy play, and are territorial of resting and hunting grounds. Dogs differ from each other in personality and disposition. Some dogs are naturally even-tempered. Others have aggressive tendencies. Similar to human siblings, you may find great differences between puppies within the same litter.

Male dogs tend to be more active and destructive than female dogs. They are more likely to fight, go to the bathroom in unwanted places to mark their territory, and try to establish dominance within the home. Once a male dog is neutered, however, it loses much of its sex-related aggression. Female dogs, in general, are more affectionate, playful, and friendly. These, of course, are generalizations. There are always innumerable exceptions.

Dog Behavior Problems to Watch for
Even well-trained dogs may try to redefine their roles at home after behaving well for several years. Some dogs try to claim dominance by ignoring your commands or being territorial of toys or sleeping areas. If you notice your dog growling when someone tries to take his bone, for example, address the issue immediately. If the behavior continues, it's a good idea to return to obedience training. This will remind your dog who the boss really is and, in most cases, correct his behavioral problems.