Hi, I have a duckling that hatched this morning 8 hours ago. He can’t uncurl his leg and I can’t straighten it. His brother was star gazing which I treated successfully with brewers yeast. I’ve tried it with this little one but no joy. He is very perky and drinking vitamin water. The joint looks swollen but could’ve be because he’s hobbling on it! Still in the incubator with lots of cuddles! Any ideas?