My Standard Bred is Gelded and he is 20 years old. Should back be getting low right? And is there anything I can do to bring it back up? Or is it just a growth thing? Will his back hurt when I ride him?
The back will start to sway with old age but there is no set age to when it will start to sway. I have never seen anyone be able to regain all the muscle lost to lift the back. But you can do stretches to help strengthen the back. Like tickling the belly is one. As for riding as long as you have a good saddle fit and a good comfy saddle pad you should be fine. I have seen horses ridden into the older 20's early 30's.
Another important thing is to have the vet look at his back to make sure everything is ok when you firstnotice the back starting to sway. That way they can give you tips on how to strenghten the specific areas where the muscle is not as prominent.