The whole point is, there is no reason to kill it. Bull snakes imitate a VENOMOUS (not poisonous) snake, yes. But if you took the time to look them up and learn the differences, then you wouldnt have to kill them. Also, the snakes eyes is one of the smallest ways to tell the difference. Venomous snakes have a totally different body shape. Like I said, if you took the time to look this stuff up, you wouldnt have to kill harmless animals. I personally think whoever kills snakes is ignorant, because they dont take the time to do something different. If you snake proofed your stinkin coop, you wouldnt have to worry about it.