I have been trying to find out if Yucca and Cat's Claw (common ingredients in joint supplements) are illegal drugs to have your horse on at shows, events, etc. I did find that the FEI has a new restricted drugs list, but I still cant figure out if they are illegal or not and if they wills show up on a drug test. I know that devils claw is one of these drugs, so it seems that cats claw would be also.