The horse was presenting signs of heart attack on the camera but no one was actually even giving it a second thought and at the end when it was the last lap, all the horses got whipped excessively hard as well. That gets me to my point "why do you support horse racing?" This is honestly far to cruel to continue.
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*.
I really like animals and therefore i don't watch or bet on stuff like horse or dog racing because everyone that is not completely naive knows that most of those animals are having a pretty bad life. Like you already said those poor horses get whipped so excessively during a race just to keep on running even though they are already completely exhausted. That being said i don't think that we will see a ban on horse or dog racing anytime soon. As others in this thread have already mentioned, horse racing is probably one of the oldest sports out there and there is also a huge amount of money involved. We can just hope that changes will be made in order to improve the live of the animals that are involved.