I've noticed that Bailey has these bursts of energy that my husband has taken to calling "hurricane." It's the funniest thing. We will be playing normally and all of a sudden Bailey will drop his toy and start sprinting around the room -- sometimes running around the coffee table or just running back and forth. He will effortlessly jump over an outstretched leg or toy that's on the floor, and his ears stream behind him. It will only last for two or three minutes and is an immediate indication that he will have to be taken out as soon as it is over. I'm thinking I may have a little agility fan on my hands once he's old enough for it. Do any of your cavs do anything like this?