I came home from work tonight and was petting my middle cat and noticed that a clicking noise seemed to be coming from his right ear when he'd shake his head. I picked him up, and he'd move his head, and I'd hear clicking. I put him on the bed, he shook his head, and again, clicking. The inside of his ears are dirty (as are the insides of the ears of the other two cats). He shies away when we try to touch his right ear, but acts as if he's in heaven when we touch his left ear. He usually loves having his ears rubbed, both the outside/backs and the base of the opening. Tonight, on the right ear, not at all.
Any ideas what it might be?
Any ideas what it might be?