Good Morning Barbara, They have all kinds of drug testing and the racing commisions claim that over 99% of the test are clean yet every day in racing thousands of horses are given other shots with their lasix that they should not be given. Some of the shots are for bleeding, these include drugs like: Magneseium Sulfate, Kentucky Red, Clotol, others are cortico steroids like Azium and others are to try and get the horse to relax like B1 or ACTH. The problem with the drug testing is that if the drugs are not on the list to test for,  and the trainers and vets know which ones are and are not, then they never have any positive drug test. There is a 24 hour rule at most tracks, that no shots are allowed other than lasix on race day. But this rule is ignored by most vets and trainers. I have been having a hard time getting my book out there as the racing press seems to want to sweep it under the rug and does not want any bad press for racing. I have contacted many publications only to be turned away due to the content of the book. We are however starting to get some good reviews from some of the top people in the industry so I am hoping that gets the ball rolling. Have a Great Day!