Bettors that hold onto their losing tickets that are affected by a horse that is disqualified a few weeks later due to a blood test should be able to redeem those tickets for the face value. I know it would be impossible to figure out a way to "make right" cashed in tickets affected by a drugged horse coming into a payout, at least the redeeming of some tickets and having the tracks pay out cash would put extra pressure on weeding out trainers who do not follow the rules. Issuing fines to the trainer now, returning purse money to be redistributed and suspensions are good but it must go further. Drivers that do not follow the rules in a race are taken down and other horses moved up so in some way the sport should find a way to protect bettors who are some of the people who heavily support the sport/business.. If a bettor keeps his losing tickets and it is later found out that the race outcome was fixed due to drugs and the bettor would have won on those tickets, he should at the very least able to redeem the ticket for the amount bet.