I would take him back to the vet and have him checked out. Your vet would probably have better advice than what anyone here could provide you.

I agree, could have an infection or other post-op complication. Or he could have something else wrong, like a luxating patella. At the very least, he needs pain meds, as non weight bearing lameness is a sign of severe pain.

Hi Meghane - you must be busy - haven't seen your posts in awhile. I always enjoy your educated words of wisdom.

Thanks sephia. Actually for some reason, my safari browser decided not to open gardenweb or THS forums any more. I thought the site was down until I switched browsers for other reasons. Have been busy too, but missed it here!