Hey! Moonlight is adorable. I know all about old horses acting like they're so young lol! I ride a 27/28 yo Morgan mare who is so hot and loves to GO ha. Her name is Amarillo. I've learned to do barrel racing on her.

What discipline do you do?
I've been riding for 4 years but I don't own any horses or lease--I've just stuck with my barn's trustworthy lesson horses.

I've ridden nearly all of them, although by now I pretty much only ride 3 different horses; Sky, a lazy Quarter Horse, Amo who I mentioned above, and then another Morgan called Vinny. He's not a lesson horse--he can't really be one because he's so mean lol, but the owner has been with my trainer a long time so she allows him to be ridden by other people, me included. Vinny actually can be very sweet and he's super well trained, he just hates kids and also can be pretty bratty so it's safer not to use him as a lesson horse aha.
To not make a huge post I'll just tell you who's who:
Amarillo is the bay with the white forehead (pink halter), Sky is the bay with the blaze, and Vinny is the solid bay.