The CO2 cylinder you see there is not to release CO2 into the rat’s breathing atmosphere. It is more like the use of CO2 in an air pistol.
The depicted product is a Goodnature A24 self-reloading rat trap. According to the manual:
The A24 is powered by a CO2 gas canister and will last for 24 kills. The trigger is placed directly below the lure, so that when the rodent moves the trigger, the trap fires a piston directly into the back to the rodent’s head, killing the rodent swiftly and humanely.
The CO2 cylinder you see there is not to release CO2 into the rat’s breathing atmosphere. It is more like the use of CO2 in an air pistol.
The depicted product is a Goodnature A24 self-reloading rat trap. According to the manual:
PDF link.