What's wrong with my dog?

WOW! He's a cuties I have a dog that is"special" we've taken him to the vet and well we don't treat him any differently we don't pick him up because he wont let us due to the fact that he fall of the bed at a very young age and grew a ball in his neck and screams when you touch it he is on meds for that, but other then that he's a cutie! he will be 12 years old in dec. He is still alive and he does have the same eyes as you dog, kind of the same characteristics, but if he doesn't think that anything is wrong with him, why let him know, he's very playful he doesn't eat much but he's fat I thinks it's because of low metabolism! But other then that your dog should be fine, usless he shows signs of pain then you should take him in! other then that your good, I mean he's gone this long, and for the allergies just make sure you clean his nose often or keep him inside when you are doing yard work, my other dog was allergic to gr!