Sammy had the surgery in March and we are quite happy with the results. You should definitely go have a consult with the orthopedic specialist and have x-rays taken. I think that cost us about $100 for the consult. We had a good idea that Sam needed the surgery because of the way she walked, although she always jumped and stuff and never limped, she walked funny as she found ways to walk without bending her knees too much. Now she runs and jumps twice as far. She used to only be able to walk a few houses before getting tired and now she can keep up with her big brother!