I had yet another experience on the last feeding day in which a rat did not die instantly when "whacking" it. I felt bad for it so I decided to build a gas chamber for this time around and I must say, they did seem to go more peacefully. It was very efficient, clean, and faster then I thought it would be. I just pack some dried ice into the bottle and close the lid to the tub. Much easier and in my opinion kinder then whacking.

Here are a couple of pics:




I made seperate chambers so they arent crawling all over each other and freaking out. I drilled a bunch of holes to ensure the gas is getting in and I am not dragging things out...