I was also wondering at what age he should be retired for stud? This is in a US schedule game, I don't know if that makes a difference in the game, but I know IRL European horses race longer, so yeah I don't know if the game acknowledges that in the US most horses (from what I've seen) retire after their 5th season. And then until what age should I breed him? I know younger horses produce better foals IRL, but I am still unsure if the game takes that into account.