Bellicosity of dogs
A study of the Veterinary university in Hannover in Germany shows, that dogs aren't aggressive naturally. Within the study they made a research on more than tausend dogs - bull terriers, pitbull terriers, American Staffordshirs dogs, dobermans and rotvailers. They were considered on the behaviour of dogs to other dogs and also to people in different stressful situations. Only about 3% of dogs were aggressiv. The scientists say the bellicosity of dogs doesn't depend on breed of dogs. It is the result of dressur. For example - the bull terriers are friendly and mellow dogs.