The dog with the strongest bite is the Rottweiler. The strength of the bite of this breed is estimated to be 328 pounds per square inch. Dogs with big heads and wide jaws tend to have the strongest bite.
The dogs with the next strongest bite are the American Pit Bull and the German Shepherd, with bites of about 269 pounds per square inch. The strength of a human bite is around 120 pounds per square inch. Rottweilers are regarded as excellent guard dogs and can be very protective of their owners. They need lots of exercise and because they are intelligent dogs, they enjoy training sessions.