I have a mare that staked her chest on a fence. She now has air under her skin (between the skin and the meat). In some areas you can press the skin in about 3 inches before you touch the meat. If you put a needle under the skin the air hisses out. This is over the whole body, even her head. It is very strange. I think this condition may be called "crepitus" and is apparently from the would acting like a one way valve and letting air into the body. Wondering if anyone else has had this happen and how long it took to go away, how they treated it etc.