I love snakes, especially black rat and all types of king snakes. Where I am we don't have any rattlesnakes or cottonmouths. We do have some copperheads. Here in Missouri there is a $500 fine for killing snakes (unless protecting yourself, family, or your stock). I found a nearly 5' black snake in the poop catcher of my coop when I went to get eggs today. There were two eggs in the coop and no bulges in the snake. I have heard that black snakes will eat copperheads. I much prefer the docile and harmless black snake to copperheads, so I try to let them be. They also eat mice and other varmits. The hens didn't seem distressed by its presence at all, but they went crazy over an 18" milk snake this spring (I had to rescue the poor thing from a ring of squawking hens before they pecked it). I don't have any chicks, but I think I'll put up some wire with smaller openings just to be on the safe side. If it becomes a nuisance, I will relocate it. I know most people don't like snakes, but they really can be valuable.