form of euthanasia, as it can take up to 20 minutes to fully euthanize the animal. If the chambers are not calibrated correctly or the animal is ill, the process is only delayed further, which can cause more harm to the animal.

Cervical dislocation

Cervical dislocation, or displacement (breaking or fracturing) of the neck, is an older and less common method of killing small animals such as mice. When performed properly, it is intended to cause a death that is as painless as possible

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