My pup is a rescue and was pretty starved for the first 3 months of his life. I have had him for almost 3 months now and noticed that he seems different from other pups I have had. He loves to please but doesn't really respond to commands or even his name! His tongue is very thick and tends to hang out the side of his mouth and he just doesn't seem to be able to learn much of anything! I love him so very much but I often wonder if he has some kind of brain damage, is that even possible?