we woke up to find one of our hens limping around. It wasnt noticeable at first, but when she started running for treats she started doing this comical hop/run. We checked her foot and couldnt find any signs of anything. Since shes a wyandotte which is a heavy breed I looked up bumblefoot, but she doesnt have any swelling on her foot. Her foot wasnt like that all yesterday. Does anyone know what it might be? Is there anything we can do?