Winter is well and truly upon us, and these colder months can be particularly tough on our equine friends. One particular condition that all of us are familiar with is arthritis. It can affect us as well as our pets and the colder weather often exacerbates this condition. In this article, Dr Sarah Van Dyk from WestVETS Animal Hospital and Equine Reproduction Centre gives an overview of how arthritis affects older horses, the signs they may show, its diagnosis and treatment options. What is arthritis?