Ok so less than a week ago, my 20in ck Managed to get this piece below his jaw to pop out. Originally it was white in color but over a few days it began to take a dark redish color. I Netted him and attempted to push the piece back in but was unsuccessful. I didn't want to make things worst so I didn't force it. The potruding piece is very hard and sturdy. Seems like it could be a bone. Any advice on how to resolve this issue? Here are some pics.
