I did catch Fred and Copper playing last week and got a few pics. I had to take the pictures from the house, because if I went outside they would immediately stop.
These two play a lot and it seems pretty fair. I'm always worried about the little guy getting hurt, but in reality, Fred is the one that gets picked on the most. He has quite a few bite marks from this winter that are finally growing in new hair.
Sorry about the photo quality - I need a bigger zoom lens - put that on my shopping wish list!