I know there are a ton of variables that can come into play with a question like this, so I'm only asking in the most general sense. But best case scenario, at what age do you expect an event horse to start having some problems with soreness, injury, and maintenance? I know that will vary based on many factors, but for sure the length of time they've been eventing and the level and how hard they've been ridden. But if you look at a moderate case, when would you start expecting some issues to crop up? I'm just not sure how long its fair to ask a horse to event and how you can determine when its time to stop without going too far. Does that make any sense at all? LOL. Asking for a friend of mine as I have very little experience with event horses.
Any opinions/information appreciated.