Dog Aggression

A dog can be aggressive when protecting his owner's property against a stranger. This instinct is used in training for guardian dogs. The problem is always when a confident kid does not recognize the warning signals of a dog. Likewise, a female dog will defend her puppies if she feels they are in danger. This aggressiveness also has its roots in hormonal changes. However, this conduct could be unexpected when the dog suffers of an apparent pregnancy. Objects like toys, are seen as substitutes for puppies, and trying to catch some of them to play with the dog, could cause a rare and unexpected aggression. Pain can also cause aggressiveness, and some other medical problems, like brain tumors, can transform the dog into a wild one, like hydrophobia.

How can I overcome my dog's conduct problems?