How many days old must a rat be before it can be euthanized via CO2?

[Peter Williams]

I have some that are 21 days old today, can I use my gas chamber on them?

[littleindiangirl]

Yes. that is fine.

[Stewart_Reptiles]

Yes you can use a CO2 chamber with rats that age.

[Beardedragon]

How old do they have to be before you cant do it? I was under the impression any age would work. Although i might be thinking of mice.

[littleindiangirl]

Pinkies and fuzzy's aren't as susceptable to CO2, so putting them into a deep freeze is considered more humane thatn CO2 chamber. I believe I read on here that the co2 creates an acid when in the lungs of the pinkies and fuzzies. anything older than that is put down with co2.

[Orm]

It's the diving reflex - pinkies and fuzzies can hold their breath so using gas chamber will suffocate them. Not quick or nice. I've bred only mice, but I've used 10 days as a rule of thumb. Any older goes with CO2, any younger with other methods.