What are your horses temperaments like? Are they pretty relaxed at races or do they get hot?
JJ is the hotter type horse that gets worked up easier. So at races I get on about 15-20 minutes before my run so I can warm him up good but also not on so long that he gets chargy and on the muscle. He is the horse that KNOWS what he is there for. I like to head and sit at the arena when it is my drag so he can settle down and get focused, then maybe walk a few circles. The quieter I am the less he gets wound up. If he starts getting hot and fidgety at the gate I will take him to a few races and go make him stand and do a few trotting exhibitions to get him leveled out to where I feel he is going to focus better and not get worked up.
Now Scrat is very laid back and isn't wound as tight as JJ and doesn't get worked up over little things and enjoys standing and watching all the other horses go. And when he starts running more he I'm sure is going to be pretty laid back while we wait and such.
So what about your horses?