Laurence Dillière-Lesseur and Alexandra Couture are veterinary behaviourists and graduates of French veterinary schools. They are members of Zoopsy, a French association of zoopsychiatry (animal psychiatry).

Contrary to popular belief, there are no precise morphological characteristics that would allow us to determine whether a dog is dangerous.
However, some dogs (because of their early experiences or training) can very easily become aggressive, but this has nothing to do with the dog’s breed. A Chihuahua can be just as dangerous as a pit bull, though it will in all likelihood inflict less serious injuries: first and foremost, a Chihuahua is a dog.
The authors review what is now known about canine aggression. They stress the vital importance of training and explain how it is possible, by enforcing clear rules and strict commands, to prevent any danger of aggression, at home or in the street, in the presence of children or animals.

• Pet aggression is a common problem.
• It is crucial to understand your dog’s real nature, behaviour and the characteristics of its breed.
• Clear communication and an appropriate approach can prevent violent incidents.
• Practical advice on how to neutralise incipient pet aggression.