If you want to keep your own horse happy and healthy in his golden years, then you need to know what aging horses go through physically and how to keep them comfortable through it. Simple changes to your usual treatment of your horse can also keep your companion from declining in health as quickly, ensuring you can enjoy each other longer. Much of what your senior horse will need is easy to provide on your own. However, you likely will need some help from a qualified vet and other professionals, too.