My 13 pound Maggie had the same condition. At 6 months we thought she just pulled a ligament. But the knee began to luxate. Then at 16 months the other one went out. She could hardly walk or squat properly after that.
Yes, this is evidently a congenital prob with these little ones. Yorkies have this too - a friend of mind had her Yorkie's knees done early in 2007. Having watched his progress and outcome, when we got the diagnosis for Maggie, I was less afraid of the surgery.
So last October we had both her knees done. We are fortunate to have a top notch vet surgeon nearby. She carved grooves in her bone for the ligaments, repositioned the kneecap by repositioning the tendon and pinning the bone in place.
She had a long recovery; it was on track but it does take time and energy on their people's part to get them through. We even had to help her go pee & potty b/c she couldn't squat the first 10 days or so after she came home. Bless her heart. She was creative though and could balance on two legs if she needed to! lol We can laugh now.
She has come through it like a charm and she now can run and play like she never had the problem.
It was a scary decision to make, but it was the right one for us. She was in so much pain after the second knee went that we just had to do something. Putting her down was not an option although several friends thought we were nuts putting that much money into our furbaby. It really was not an option not to try. We found the money and made it happen.
I hope little Bob gets some relief. I am a Reiki practitioner and we used it a lot on Maggie to reduce swelling and help with her discomfort.
You might want to look into complimentary modalities to work with what the vet is doing for Bob.
In some cases if the patella moves to the side and stays there - it will fuse that way. The joint is no longer a joint as such and they develop arthritis and a limp. Even with the surgery they will likely develop arthritis b/c of the joint being messed with.
Maggie sends puppy kisses to Bob.
My positive affirmation, said many times during the day:
I am happy, healthy, slender and prosperous.
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