Hi MJM
Glad to hear she doesn't have to wear the collar that long.
Really glad she is eating!!! Running around sounds great too!
I think, that it would be normal for her to be limping. Just like humans, I'm sure it's still tender from the surgery. If it's a bad limp I would call the vet.
Then again, I ALWAYS pestered my vet!!
For the least little thing.LOL! Call the vet for your own peace of mind!