I can't afford to make a Co2 chamber and I read that you can just use a mouse trap to euthinize a couple of rats. After all it just snaps their neck real quick and they don't suffer. But the thing is one of the first litters I get I'm going to euthinize for my little cornsnake. But I'm pretty sure using a rat trap on a rat that small will just slice off its head. Is there any other way (besides Co2) to euthinize a newborn rat?