Assistant Laboratory Animal Technician (ALAT) Practice Exam

Which of the following is a common method for euthanizing small animals?

1. Carbon dioxide inhalation

2. Electric shock

3. Physical restraint

4. Water immersion

The correct answer is: Carbon dioxide inhalation

Carbon dioxide inhalation is a widely accepted method for euthanizing small animals. This technique involves exposing the animal to a controlled environment where carbon dioxide is gradually introduced. The process is designed to induce unconsciousness swiftly, followed by death. This method is recognized for being humane when performed correctly, as it minimizes stress and pain for the animal if the concentration of CO2 is appropriately regulated. Other methods mentioned have significant drawbacks or ethical concerns. Electric shock, for instance, can cause pain and distress if not executed with precision and is not generally recommended for euthanasia purposes. Physical restraint can be necessary during certain procedures but does not provide a means of humane euthanasia. Water immersion can induce distress and suffering, making it an unacceptable practice in most animal welfare guidelines. Therefore, carbon dioxide inhalation stands out as the preferred and humane choice in the euthanasia of small animals.