I have a 2 year old Chinese goose. She started limping about two months ago and now cannot walk or stand. Avian vet said no broken bones and put her on metacam for pain and swelling. After 7 day there are no changes. I noticed that when she sits she is constantly shaking her head or rubbing her head on her body. Could this be a sign? The vet took a stool sample and said no worms detected. Would a gizzard worm show up in the stool I tried to post a video of her head movement but it says the video type is not accepted. Any ideas?