I do Steph. I have two male cats one is 13yrs old and one is 12yrs old. You would think by now that there wouldn't be any dominance issue but I still have them. The older cat loves to clean the younger cat. The younger cat likes to clean himself. They always fight about that. They sometimes fuss about the spot they like to lay in during the day. My older cat, if he isn't laying in his own pet bed, has a certain spot he likes to lay at under the dining room table. Well, the younger cat likes to lay there too (because it's out of the way, no dogs can whiz by them, etc). If the younger cat gets there first, and then the older cat comes trotting over and wants to lay there...they will start fussing and meowing and batting each other....When I hear them I have to break it up every time. The older cat likes to clean himself too, he won't let the younger cat clean him, but he wants to clean the younger cat. He will actually hold his head still to clean him. The younger cat gets mad too. This morning they must have really had some kind of tussle, because under the dining rom table there was some small pieces (clumps) of white cat hair. It does no good to separate them either, because they go right back at each other, unless I raise my voice and say a really firm "NO" or use a spray bottle. That sometimes helps.