A friend let me know about this site. It has some great info on how to go about killing your own rodents, and mking your own gas chamber. I will see what I can do about having it put in the DIY section. Here is the link

http://www.alysion.org/euthanasia/index.html

I know this will be a great help to those of us who don't want to feed live, but don't have great access to dry ice or other meathods of painless death.