I use a human grade glucomsomine/chondroitin suppliment for 2 of my dogs. 1 has arthritis, the other has had hip surgery for dysplasia in 1 hip and the other hip is on the mild side, so both get it and it works great for them. They were both rescues when they came to us, and I've seen the difference the suppliments make in there mobility. According to my vet not all the glucosomine/chondroitin supplements work as well, she gave me 3 brands that were good, unfortunately I don't remember the other 2. Currently I get mine at costco and it's a Kirkland brand of all things. But our vet recommended it and considering she works closing with a board certified surgeon whose well known for her technique in helping dogs with dysplasia I'm willing to go with it....