Co2 chamber for RATS

[reptilesalonica]

Hi, based on the Co2 chamber that succesgully described on the site:
[http://www.alysion.org/euthanasia/]
I am wondering if this method can be used for 3-4 rats too.
Will they "sleep" quickly or not?

~Greg~

[daver676]

I've only ever used this method on singles, but I'm sure you would just have to increase the amount of baking soda and vinegar used, that is if you use a bigger container.