Been pondering about this for a while now. I recently got a few adult rats and want to start breeding for pinkies... what method is best for euthanizing pinkies? The guys at S+T 'bop' em on their head when they are older, but i dont know anyone who kills pikies before feeding, and i want to freeze them for later so i need a humane way to kill them before they hit the freezer. My idea right now is carbon dioxide, and is humane if done right but im just wondering if any of you guys have any other ideas.