It is something I've struggled a lot with over the years. Like many fans of the sport, I have become adept at blanking out the deaths. TV cameras swiftly cut to a different angle when a horse breaks down, the passing of a horse is noted with due sadness and reverence, and then its on to the next race. I feel guilty for being thrilled at the the sight of a horse soaring over a fence and, no matter how often I tell myself they are treated like royalty, it is always in the back of my mind that they are just one piece of bad luck from disaster. I force myself to look at the racehorse death watch site regularly to remind me of the toll the sport takes on its greatest asset:
https://www.horsedeathwatch.com/
There are horses, like Vautour, who met their end just running around in a field. There are untold deaths in flat racing where some part of the horses body is stretched beyond its limits. But asking a horse to repeatedly jump obstacles adds a whole new dimension of risk and I couldn't do it. I have had a couple of offers to join a syndicate owning a jumps horse but have politely declined. I love jumps racing but am permanently asking myself whether the awful toll it takes on the horses can be justified. I tell myself that life is full of risks (just look at the number of traffic deaths each year) and at least the authorities and protsgonists in horse racing are trying to lessen that risk. That's why I think running Constitution Hill over hurdles again would be putting something else (be it greed, ambition or whatever) in front of reducing risk to the horse's wellbeing. Give him a go on the flat but if that doesn't work, for whatever reason, retire him. Don't ask him to jump obstacles again.