I am surprised. I don't put a lot of trust in these products although I use some in the hope that something will help my 15 year old lab with her painful hips and ACL. This stuff works. I've noticed a significant improvement in her mobility - she even runs to see people without her hind end giving out. Expecting miracles? Forget it, there isn't anything out there for that. This stuff has really helped my girl, no cure but real results. I tried 16 oz first giving two teaspoons a day on her food and saw positive results. Then I bought the 64 oz. I recommend you do the same. 16 oz will give you a couple of weeks and you can evaluate results then, if it works, buy the 64 oz. I know how much you want to help your pal, this is worth a try. Good luck..