So yeah... I have a good collection of ball pythons now that all eat different sized rodents. So my step dad suggested me to breed my own rats and I do want to do this, but when I mentioned euthanizing with the co2 he said "just hold them by the tail and bang there heads on something" and I pointed out the humane way is with co2 and he said "grow a pair and just bang there heads" so does anybody have any advice on how to get him to understand? Alright now about the co2 chamber, can someone give me a link with plans to build one? Thank you.