It’s a degenerative disease, no cure and will gradually get worse. Of course yes of the horse is sound etc. Yes definitely to keeping them working to stop the stiffness, but to work on them in high intensity with jumping at some speed I would question. That mare would be in hard work up until she takes it to Badminton, not sure that’s fair really. Think how much strain is put on the hocks when taking off jumping, and her choppy short strided canter she has. However she was having behaviour issues with her which made me question it, but I guess they know that mare better than anyone.
Yes, this is my point. The horse world is very misinformed in regards to osteoarthritis (in general). There are 5 risk factors in developing/processing OA, and exercise/impact isn't one of them.
If you're interested, they are 1. Age 2. Obesity 3. Previous major sporting injury 4. Systemic (everywhere) inflammation and 5. Genetics.
It really frustrates me that the horse world thinks exercise damages joints, when we in fact know that exercise (including heavy/impact exercise) is one of the best ways to manage arthritis.
It really bothers me when people retire sound horses, due to mild-mod arthritis, thinking they're helping.
Interesting article if you want to read up
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5240031/
Anyway, gunna get off my soapbox now, and stop boring you all with science!