The Presa Canario has a powerful, square head that is nearly as wide as it is long. The muzzle is broad. The chest is deep and broad. The rump is slightly raised. This breed has thick skin, dense bones, powerful muscles and a massive head with a large jaw. The ears are usually cropped. Colors include fawn and various brindles; white markings are sometimes seen.The Presa is a very affectionate and calm dog. It can be very intimdating and can be weary of strangers unless the owner excepts them and will be willing to protect its owner at all times. they make incredible guard dogs and will protect at all cost. no member of the family can be unsure around the dog and be mistrustful to the handler.