I don't know the vet Kaspurek in Austin - but I do know Dr. Dudley at
Austin Veterinary Surgical Center, Austin, TX : Reviews and maps - Yahoo! Local
Dr. Dudley has done back surgery on my mom's doxy and knee surgery on my daughter's cocker spaniel (anterior cruciate ligament). I do not know about luxating patella's and if he does that surgery - but I would check into it if my Yorkies needed the surgery.