Last September the horse (16.2 8 year old Friesian) came in from the field with a swollen knee and intermittently lame. It looks like a clonk or a kick from another horse, but no skin or wound damage. I'll cut a long story short, but he ends up having Arthroscopy surgery in November on his knee. He had some small bone chips removed and some 'tatty' cartilage removed and tidied up. He lost approximately 20% of his cartilage. His prognosis was cautiously hopeful and after many weeks of careful rehabilitation and nursing I rode him for the first time today (the vet had advised gentle walking exercise and gradually build it up). He's on a really good supplement - Best Flex HA - and he's been out in the field for the last 2 weeks. the vet says it will take time for his cartilage to build up - although obviously will never be as good as the cartilage he was born with but he feels he will improve with time. He's sound in walk and intermittently lame if I ask for a couple of trot steps. - I'm feeling a bit cheesed of with it all...has anybody had anything similar or the same?