You can control most of the factors listed here for successful senior-horse management. While you can’t necessarily control your climate (short of relocating), it does play a role in your senior horse’s longevity.
When I moved to Southern California from Oregon, I had several world champion horses that were starting to show their age. They were getting sore and arthritic. The warm, dry California weather changed their condition drastically.
Cold, harsh winters are hard on seniors. Take special care to keep your senior horses comfortable if you face frigid, wet winters. Find tips on page 24.