My Marley is 10 years old and his breath is just horrible... its so bad, even when he is laying by you, you can smell it. I had taken him to the vet and gotten his teeth cleaned, 4 teeth were pulled. but nothing changed with the smell. He WILL NOT eat any kind of dog food. ive tried everything. he will only eat what i eat so I try to feed him cooked chicken, and rice. He does burp alot and when he does the smell is worse, so that makes me wonder if maybe its some kind of internal infection? He wont let me clean his teeth, He wont chew on dental bones. Im not sure what to do at this point.