Lost my first two 2-month old chicks last night from a chicken run that is entirely encaged. I assume a racoon. Can't figure out how it got in, but perhaps just reached through the wire and dismembered them? It was messy. Now I can't figure out if I should give up my last two chicks so they'll be safe or not. What can I do to make it safer if it's already entirely enclosed?? I see racoons and possums in the backyard constantly, although I live in the middle of a city. How can I keep them from eating all my chickens?