POLL: do you know any horses with arthritis?

please tell me their age when diagnosed, how old they are now, what discipline they do and how the arthritis is managed. thank you so much!! my 6 year old ottb has arthritis in her hocks and i'm so scared that she wont last. we do lower level dressage and jump about 2 ft. Please share your stories!! i need some reassurance that she will be fine:)