How does he react when you come up from behind him? Does wake up when you rattle a dish or call out his name if does either of those he has selective hearing. I have had two dogs go deaf one went deaf and blind that was hard. The deaf was okay I just didnt let him get too far away from me.
Very cute! I wasn't watching very closely, but I'm pretty sure when you talked to the golden's tail wagged just that bit harder when you talked to him! Open the dog treat container and see if they come running.