No it is not animal abuse. Trust me, I have been around horses and horse racing for years here in Texas and they are monitored to meet certain standards. Horses are amazing, muscular, powerful creatures and really are athletes in a way. The people that own these horses take great care of them and spend A LOT of money to keep the horses very healthy. Majority have a great love for horses/animals and take part in horse racing, jumping, barrel racing, etc. It is not much different than taking your dog that you love so much to a competition or show.