Blue heelers bite so much because they were bred to control cattle. They can force entire herds of cattle to go where they want by snapping at the heels of stubborn cows and irritable bulls.
As a result, trying to herd people or other animals by biting is something they do instinctively.
Blue heelers can bite too much if they haven’t been trained to understand that biting is not desirable.
It’s a good idea to enroll a blue heeler puppy in obedience classes as early as possible to prevent bad biting habits.
An adult blue heeler will also need to be trained not to give in to his natural herding and biting instincts.