Also, some ex racers get very jazzed up, or worse out of their minds, when they hear the PA system. It brings them back to the race track. If it's possible to bring him to the show grounds a few times and not compete, and see you he is, that would be great. Also, ear puffs are a good idea. I just rode a long long ex racer last night for my first time riding that particular horse in a show. I was told to put ear puffs in his ears, and forgot. He is usually very lazy and let's just say that lazy was not in his vocabulary at the show, lol. Oh how I wish I'd remember those ear puffs ... No harm or embarrasment to horse or rider, just lots of excess energy :).