Lightning used to do this to his ears as a pup, but only when he was sitting on my bed. It was more of a game. When I got Stomps I had to stop letting them sleep with me, so Lightning stopped grabbing his ears (Stomps NEVER would have let Lightning grab his--Stomps'--ears). Then a year or two after I stopped letting the dogs sleep with me, for some reason I had Lightning in my room on my bed--Stomps must have been at the vet or something--and Lightning started grabbing his ears again! He would swing his head from side to side until an ear would slap his mouth. It was so funny. But then when he had to go back to sleeping in "his" room he stopped.