Here is a link to my thread about lp surgery on my little one. After all said and one, I have to say that I am glad we did it. He's so much better now.
http://www.yorkietalk.com/forums/yor...picture-b.html
I am sorry your little one is in such pain and may have to have both knees done. We were fortunate and only had an issue with one knee. Feel free to pm with any questions. All the best.