Make sure you continue to follow his tonsil/throat problem. My cavalier had laryngeal prolapse at age 3 - hence one side of her throat is permanently sutured back. It was a gradual progression tho- my vet had no idea that she was so severe. He'd never seen it happen in a dog such as mine - usually occurs in a working dog such as a border collie, etc.
She has done fine x 5 years post surgery. Has to eat small bites of food. Otherwise, she is great! Still loves her cookies!!
At my house, nobody ever just has a small medical problem