Yes, they can be mean little buggers and fight like most Bulldogs by getting a hold and hanging on until they can get a better one. Fortunately, they can't do a lot of damage with their small, mishappen teeth and the loose skin around their faces prevents serious injury. I get ahold of their collars, keep them from shaking each other and just wait for a re-grip attempt and seperate them. Sometimes it can take awhile. The wife and I laughed pretty good on the way home over the whole incident as a fight wasn't exactly what everyone was expecting or ready for at obedience class.