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  My Jilly had that bilaterally but only a low grade lux and she was managed conservatively.  I was very careful to prevent her jumping as much as I could, provided her doggy steps for couches and beds and helping her down from those myself as much as possible to keep her from jolting down those steps so much.  I did not teach her any tricks or anything requiring her to bend that leg unnecessarily so no "sit" or anything for Jilly & no agility.  I don't know now - now vets may recommend agility or something but back when I had Jilly, she was prevented from it - plus, she was so sickly & fragile, I wouldn't have had her in that anyway.  She never had her patella catch nor did she ever limp in her lifetime from it so I guess we were very lucky and a bit successful in keeping her activities somewhat limited to protect the instability at that tiny portion of the knee joint.  I hope your baby can be managed without the need for surgery.  
				__________________  Jeanie and Tibbe  One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |