Every dog is different, of course, but I've found that Goldens are one of the more intelligent breeds when it comes to their eagerness to learn/try new things and please their owners.

Has he ever been to a vet for his skin/coat and ear problems? Goldens are especially prone to these types of conditions. She should definitely get him to a vet if his breathing seems to be of concern, too. That must be completely dreadful for him.. ugh.

That poor boy deserves so much better. How sad.