I have 4 Pekin Ducks and all 4 have recently started bleeding at the end of there wings. Its strange because they all are exhibiting this behavior. They have been in with the chickens since they were one week old and they are now 2 months. I am very concerned about them but I just don't understand what is going on. Is it that the chickens are pecking them or is this something like a disease. Anyones advice would be much appreciated! I just don't want to see Huey, Dewey, Luey and Stewart die! Please help!