References
USDA Animal Welfare Act Regulations And Standards, Part 1 (Definitions) – Euthanasia
From the USDA Animal Welfare Act regulations and Standards, Part 1 (definitions)-
“Euthanasia means the humane destruction of an animal accomplished by a method that produces rapid unconsciousness and subsequent death without evidence of pain or distress, or a method that utilizes anesthesia produced by an agent that causes painless loss of consciousness and subsequent death”