According the this site:
https://www.horsedeathwatch.com/background.php they have seen more than 2000 deaths in around 5500 days. Most of the horses die during the match as well, they also have instances where they are exploited using drugs (doping).
Are you aware that most of the horses go through slaughter as well? Some of them have very bad injuries making them not even the least bit useful for the business therefore they are killed without second thought. I do hope people would get more aware and try and steer away from *horse racing*.
That's very sad to hear. There should be a proper body that should make rules and regulations for horse racing and also the horses which are fed drugs should be banned from the play. We need to either make horse racing a better sport or make it prohibited everywhere. Gambling has nothing to do with all this stuff.
If there are horse racing matches, the gamblers will keep betting on them and there is no issue with this.