I did that just yesterday. I killed a rat and a mouse. I don't really have a problem with killing them for my snakes but I guess it takes some getting used to. Yesterday I bought a small rat for Jojo. I slammed him against the counter and assumed he was dead. He was motionless when i was using the tongs to do the rat dance. Well when Jojo striked at him the rat let out a little squeel but didnt move when Jojo was contricting him. After having snakes for like 3 years it still makes my cringe when i hear a rodent squeel after being struck.