We also get a good laugh when the rumble begins! As long as it doesn't get too ugly then I don't intervene. I will just watch and laugh at their silly struts and crab walks! (thats what I call them anyway). Sammy and Leroy will occasionally trade swats back and forth. It is so funny because both of them will have their ears pinned, eyes closed and the paws flying! The funny part is they never touch each other!!!! Goofy cats!!