never knew this
"It should be noted here, as well, that California allows trainers to take horses on and off Lasix without public knowledge. The attending veterinarians are allowed to use the steroidal estrogen hormone Premarin instead of Lasix. The California attending veterinarians are at liberty to switch out established race-day Lasix administration for race-day Premarin without the public disclosure of the change. All the while the horse is listed on the program as a Lasix horse race after race, despite differing medication regimens from race to race"
http://therail.blogs.nytimes.com/201...ments#comments