Agression With Dogs: How It Came Into Being

The highest incidence of dominance aggression occurs in intact males, followed, in decreasing order of frequency, by castrated males, spayed females and unsprayed females English Springer spaniels, Lhaso apsos, cocker spaniels, Doberman pinschers, and toy poodle and terrier breeds have been reported to have a higher incidence of this type of aggression, but it can occur in any breed of dog