The American Bulldog is a very muscular, sturdy dog with a large, powerful head and jaws. They are very strong, but agile and light on their feet. Their chest is wide and the muscular neck tapers from shoulders to head. Their neck may have a slight dewlap. The head is square and broad with muscular cheeks and a furrow between the rounded eyes. The American Bulldog also has a strong muzzle that’s shaped like a box.