I saw a crippled doe (who was obviously the matriarch) have a sparring match with a decent 6 point during the rut. Even though she was missing the use of a rear leg, she initiated the "match" and seemed to get the better of him!

I also watched a red fox catch a mouse and the REPEATEDLY turn him loose and give the mouse time to turn away WHILE THE FOX TURNED HIS BACK! He caught and released the mouse about half a dozen times or so and then left without hurting the mouse. I watched a very wet and very pi$$ed off mouse run back into the woods