Sounds like play. They'll figure it out soon enough. You're doing the right thing by watching them closely the first few days. Soon enough Brodie will find his voice and start screaming and meowing during these wrestling matches... and then your heart will leap to your throat... but many times its just a "battle cry" and they are enjoying themselves. I would time and time again pull Pouncer off Harry and "save" Harry from what I thought was a bad fight. Harry would wriggle out of my arms to go instigate the fight again Only a few times was that cry a real cry of "I give up"