Morgan has a LP in her right hind as well. Right now she is on this
http://stores.wildaboutmeat.com/Detail.bok?no=1034 however this product, like Missing Link doesn't tell you exactly how much glucosamine and Chondroitin are actually in it. So when i'm done with this i'm getting this product
http://stores.wildaboutmeat.com/Detail.bok?no=1037
For dogs showing constant signs of LP i'd probably go with this
http://stores.wildaboutmeat.com/Detail.bok?no=1276
i love this holistic store. Its near my house so we go all the time. The owners are great and very knowledgeable.