That's just like what happened to me except someone shot my dog. I don't understand the cruelty of people. I'm so sorry you lost a chicken. I would have taken the gun you found to the police so they could have gotten fingerprints from it! It seems likely that the person that did this will do it again, perhaps somewhere else, to someone else and prints may have been helpful in future. I'm happy your other chicken was able to be saved. We spent tons of money to save our dog (they said he wouldn't live) and never caught the degenerate who shot him. He's fine today. Best wishes and again, I am sorry for your loss.