- Jun 10, 2014
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No, it's really not painless. The vast majority of animals don't have 'oxygen sensors' in their blood, they actually monitor CO2 concentration in the blood. When you gas a bird with CO2, the bird knows it's not getting enough oxygen, It goes through stages of panic, anxiety, and then a painful death. In order to be humane, it has to be something other than CO2 - like nitrogen gas, or better an anesthetic. Gassing something with CO2 is a lot like drowning - it's not pleasant.It is perfectly acceptable and humane when done correctly. Vinegar and soda is not correctly. With a proper chamber, a tank of CO2 and a flow regulator it is a simple and painless process. It is the preferred method when culling flocks of resident canadian geese.
Most of the AVMA's recommendations for gassing refer to gassing with anesthetics - and they specifically recommend that because containment gassing often causes anxious behavior and animal stress. It's way more complicated, it's not particularly humane, and you're way more likely to screw something up and cause the animal a lot of pain.
The most humane methods are the fast ones - cervical dislocation, decapitation, pithing, etc