Lasix would help if they are bleeding but I have been reading that they can be conditioned with longer gallops as babies. So far so good with the boys. They were scoped and there was nothing in the throat so we are doing well with them. And if they are really bad bleeders they should not be racing at all I think. I read that horses years ago like Seabiscuit had so many more starts. Man O War ran 4 times in a month, running back in a few days and was OK. Horses do run after all . They are raised like hot house flowers as babies..mine go to a farm and run around like crazy with other babies. If they are sore, they rest, if they have a cough, they rest, no needles in the knees to pull out fluid and then stuff to dull the pain. I had to retire my Boro Kid rather than torture her and she is fit and happy upstate but will be good to go in the spring to be a jumper and show horse in the area. But you as an owner have the set down the rules and I do think trainers will be on board. They are under pressure to get the horses to run. I was so happy with the 2 colts I have. We let them get race fit, they are learning and telling us how they like to race--I think long and of the pace. We do not start them until the late fall or later when they are babies. They will do their best for you and they deserve the best.