What works for a stiff stifle? Lineaments and BOT sheet being used

Have you had them checked out. My old gelding has stifle issues and our chiropractor came out and gave him a does of estrogen and was a different horse two days later!
My horse has a stifle injury and so he limps around a lot. I've used Bute to help with the pain, but I've also heard AniMed Glucosamine works well (it is supposed to lube up the joint so it flexes easier) and it's relatively cheap.