Thanks for all the thoughtful replies. I can't stomp on the floor because everywhere but the kitchen has carpet. Mom told me that she approaches him from the front and just pets his head. I do have a clicker and he can hear that so maybe I'll try that, too. I wonder about the vibrating collar. Wouldn't that scare him as much as petting him on the back? I'm just thankful he can hear me when he's close to me. I hope he doesn't go completely deaf.