What is the correct usage of carbon monoxide in euthanasia?

Carbon monoxide is recognized as an acceptable method for euthanasia under specific guidelines, particularly due to its ability to induce unconsciousness and death quickly when delivered at appropriate concentrations. The correct concentration range for effective euthanasia typically falls between 4 to 6%, at which the animal loses consciousness rapidly followed by death. This rapid action is a critical feature for minimizing suffering, aligning with ethical standards in animal care.

In contrast, while carbon monoxide may be considered for use in euthanasia, its application must be carefully monitored due to associated risks, including potential stress responses in animals if proper techniques are not employed. It is also important to emphasize that, while the method can be efficient, the safety of human operators must also be taken into account, as carbon monoxide is a toxic gas that poses risks if not handled properly.