My off the track mare is getting a little stiff and I had her x-rayed...the vet said she showed arthritis in her hock. He wanted to inject her, but I'm so hesitant as my friend's horse died from infection after being injected in the joint. She's not lame, no one can see any lameness, but her first few trot steps are stiff, then she works out almost immediately. (She could be really stoic though as the vet implied advanced arthritis.) In fact, she's always complemented as a beautiful mover. So I'm a bit at a crossroads as I feel it's too early to inject but what do I do in the meantime.

Has anyone here injected and did you see results? Has anyone tried Adequan or Legend? Or has anyone found benefits in supplementing? My friend swears by recovery Eq Ha as the riding team she was on in college used it on all their show horses. My other friend said supplements are completely a waste as they just blow away (powder) or go right through the digestive system. Advice or suggestions?