Well.....get used to it because it's going to happen allot more in the future..

If he keeps developing like he's doing now he could be a winner in the near future...that is if you keep him from getting injured or worse ..very dominant!
You have to be able to get in that ring and show him without him lashing out at other dogs..I've seen it before...people with a beautiful Neo but he wasn't properly socialised so they weren't able to show him because he was not to be trusted around other males...other breeders left him out of their breeding stock just because of that alone!