Unlike most other bulldog breeds, they are competent swimmers. That said, they do not have the affinity for water a retriever would: they swim if they have to do it, not because they particularly enjoy it. They are capable of jumping in excess of vertically due to the dense muscle build of the breed and they love to run, jump, tackle and cavort. Lively, muddy games of rugby, Frisbee, American football, or lacrosse are rough-and-tumble games that this breed would adore, since it loves to roughhouse and will be thrilled to be included in a game with the children or help a teenager practice for the big game. A tall fence is a must to keep an American Bulldog from wandering off on an adventure and forgetting how to get home, so a microchip is highly recommended. Young American Bulldogs under the age of three years in particular love to bounce around and may accidentally knock over a toddler, a senior citizen, or a small child, so handling this breed on a leash is not recommended if one is a small child or an elderly adult, since the breed loves to pull and tug and may run away with those not strong enough to hold it.