after doing a bit of research on killing mice b4 feeding, i didnt aggree with the wacking method too much, if i had to do it i would but i wanted to find another way if possible, I learned that Co2 is the best way to put down mice or rats. ANYWAYS I remember there being some discussion a while back about how to go about making a gas chamber, and "i think" i came up (im sure im not the first) with a way which uses dry ice that works pretty well for me, so here ya go...
really hope this helps some people, feedback welcome.
Phrasty
Dont drink and drive, Smoke and fly...