Too add to the responses you already have ...THESE THREADs have additional information for you to read
http://www.yorkietalk.com/forums/sho...xating+patella http://www.yorkietalk.com/forums/sho...xating+patella
I just did a search "luxating patella" and found all sorts of info - the SEARCH function is in the blue bar across this site and GOOD LUCK...poor baby.. I hope things improve