So we have a new game... it's pound the crap out of each and wrestle in the fluff. It seems more like just charging and bounding, I just want to make sure this isn't a start to aggressive/territorial behavior. The two rats are 7wk. females from the same litter, and have been together in my home for about a week now. There is no screaming or biting that I can tell, and when they're not "rumbling" they coexist and even sleep and nap together fine. I have noticed that Mindy will drop whatever she is doing (or eating) to steal Lucy's food... no matter how big or small it is. Mindy is the bigger rat, and is much more timid though... and Lucy is a little fireball and much more curious...and she seems to be the aggressor. Any opinions on this?