My lab/shep mix had knee surgery over six weeks ago to repair an injury.

Now, when she is excited and happy to see you, she runs around on the repaired knee like nothing ever happened. She plays on it just fine and even jumps up on her hind legs when we go outside. This is a small percentage of the time.
The vast majority of the time, she still gets around with the back left leg up off the ground. Its almost as if she PREFERS getting around on three legs!
Suggestions on how I can get encourage her to get back to using it?

Thanks in advance.
My lab/shep mix had knee surgery over six weeks ago to repair an injury. Now, when she is excited and ... PREFERS getting around on three legs! Suggestions on how I can get encourage her to get back to using it?

I don't know that you can encourage her to use the leg normally except for purposely creating vigorous exercise for her. I'd think 6 weeks is plenty but be sure that that the vet who performed the surgery agrees that she can resume all activity.
The reasoning for her continuing to life the leg could be just about anything. My first thoughts are that its become habit and/or there is still some minor stiffness. When she's excited all thoughts of care for herself fly out of her head so she doesn't hesitate to use the leg. When she's not excited she considers these things. Its a bit like a person breaking an ankle. When the cast finally comes off there'll be some stiffness, possibly some soreness, and a natural tendency to favor the foot for a bit.

Tara