| Method | Animals under 125 g | Rabbits/Rodents over 125 g under 1 kg | Rabbits/Rodents over 1 kg under 5 kg | Birds | Dogs | Cats | Nonhuman Primates | Farm Animals (e.g. swine, ruminants and horses) | Reptiles | Amphibians3/Fish |
| CO2 | A | A4 | A4 | A | UNA | UNA | UNA | A 5 UNA |
A | A |
| Barbiturate Overdose/ Euthanasia Solution, Intraveneous (100 mg/kg) | A | A | A | A | A | A | A | A | A | A |
| Barbiturate Overdose/ Euthanasia Solution, Intraperitoneal (100 mg/kg) | A | A | A | A | UNA | A | UNA | A6 UNA |
A | A |
| Anesthesia and Exsanguination | A | A | A | A | A | A | A | A | A | A |
| Anesthesia and Intraveneous KCl (12 meq/kg) | A | A | A | A | A | A | A | A | A | A |
| Anesthesia and Decapitation | A | A | AWJ | A | UNA | UNA | UNA | UNA | A | A |
| Anesthesia and Cervical Dislocation | A | A | UNA | A | UNA | UNA | UNA | UNA | N/A | N/A |
| Decapitation of Awake Animal | AWJ1 | AWJ | AWJ | AWJ1 | UNA | UNA | UNA | UNA | AWJ | AWJ |
| Cervical Dislocation of Awake Animal | AWJ2 | UNA | UNA | AWJ1 | UNA | UNA | UNA | UNA | N/A | N/A |
| Other | Stunning or electrocution followed by exsanguination may be used for on-farm or slaughterhouse euthanasia. Rifle shot may be used for field euthanasia where restraint is not possible. | A- Immersion in MS222 (tricaine) or benzocaine at 2 g/L water |