When does a horse really mature? I know their training and technical skills can improve essentially forever, but when do you know their personality and attitude have settled? Eventually, I would love for this guy to be a bit more steady/btdt so he can be my babysitter for less experienced riders (friends, family, etc). Is that something that will come with more time, maturity and experience/training, or do you think a 7 year old horse is already set in their way of approaching life and riders?
What's the difference between a 7 year old and a 5 year old? Or a 3 year old? Or a 10 year old?