48 inch Large crate – this is the perfect size for an American Bulldog – from puppy size to full adulthood. We highly recommend that American Bulldog puppies have a crate that they can be comfortable at home. These pups have very sharp teeth and will be biting and chewing anything they can if left without supervision. This includes various items that can cause blockage in their intestinal tract, electrocution if they bite into a wear, and so much more. Unless you have your full attention on the puppy, he must stay in the crate. Never discipline or punish a puppy when he is in the crate. He must know that it is his safe space and his home that he can go to whenever he wishes.