Yeah, I have found that to be true, but only if they seem to have a good temperament in the first place. When they are small and grow up with larger birds they seem to not realize that they got bigger somehow. It can make them more humble, but I think the same thing can make them more violent if they have that kind of personality. Is he timid now? Timid is a better bet from what I have seen.
Hoovers has a percentage guarantee, so a certain number of mistakes is permissible depending on how many you got. I assume Mt. Healthy has something similar. They may be able to do something for you if you tell them how bummed you are, though.