Euthanasia Methods in the Absence of Veterinary Supervision

Indications for Euthanasia

Livestock owners and others who derive all or a portion of their livelihood from animal agriculture share a moral obligation to ensure the welfare of animals. Therefore, when disease or injury conditions arise that diminish quality of life or create pain and suffering that cannot be effectively relieved by medical means, euthanasia is indicated.

Examples include the following:

  • Fractures of the legs, hip or spine that are not repairable and result in immobility or inability to stand
  • Emergency medical conditions that result in excruciating pain that cannot be relieved by treatment (e.g. terminal colic in horses, or trauma associated with highway accidents
  • Emaciation and/or debilitation from disease or injury that may result in an animal being too weak to be transported
  • Paralysis from traumatic injuries or disease that result in immobility
  • Advanced eye disease (e.g. lymphoma or cancer eye in cattle)
  • Disease conditions for which cost of treatment is prohibitive
  • Disease conditions where no effective treatment is known (Johne’s Disease in ruminants), prognosis is poor or time to expected recovery is unusually prolonged
  • Rabies suspect animals – where there is significant threat to human health (These animals should not be killed by gunshot or other methods which result in head trauma that might cause excessive damage or loss of brain tissue and increase potential for human exposure to the rabies virus. Instead, rabies suspect animals should be attended to by a veterinarian who can properly euthanize the animal and obtain brain tissue for diagnostic purposes.)

Animal Handling and Welfare Considerations

Efforts should be made to minimize animal distress:

  • For domesticated animals, the presence of a familiar handler may reduce anxiety.
  • For wild or unhandled animals, euthanasia should be performed with minimal human interaction.
  • Ambulatory animals may be moved to a location that facilitates carcass removal, provided this does not cause additional distress.
  • Dragging non-ambulatory animals is unacceptable. If movement would increase suffering, euthanasia should be performed in place.

 

Human Methods for Euthanasia

  • Gunshot or Penetrating Captive Bolt

    Gunshot

    Requires a firearm of appropriate caliber and a solid-point bullet.

    Must be delivered to the correct anatomical location to ensure immediate unconsciousness and death.

  • Exanguination/Pithing/Intravaneous Injection of KCl

    Penetrating Captive Bolt which induces immediate unconsciousness and must be followed by one or more of the following to ensure death:

    Exsanguination: Induces death via blood loss.

    Pithing: Insertion of a rod or device through the bolt entry site to destroy brain and spinal cord tissue.

    Intravenous Potassium Chloride (KCl): Approximately 120 mL to induce cardiac arrest (only after unconsciousness is confirmed).

Personnel Training and Aesthetic Considerations in Euthanasia

Large farms and ranches should implement structured training programs to ensure personnel are properly instructed in humane euthanasia techniques. Proficiency is especially critical when using methods such as gunshot, penetrating captive bolt followed by exsanguination or pithing, or potassium chloride (KCl) injection. Despite experience in livestock handling, many individuals may lack knowledge of the correct anatomical landmarks required for effective euthanasia.

Due to the risks involved—particularly with firearms—only individuals who demonstrate both knowledge and skill should be authorized to perform euthanasia. Improper technique can result in unnecessary pain, partial consciousness, or injury to the animal.

Training should include:

  • Supervision by experienced personnel
  • Use of carcasses to teach anatomical landmarks and device handling
  • Practice until competence is demonstrated
  • Instruction on how to confirm death

Gunshot and captive bolt methods can be visually distressing, especially due to involuntary post-mortem movements that may be misinterpreted as signs of suffering. Whenever possible, these procedures should be conducted out of public view to minimize emotional impact.

References

  • Australian Veterinary Association. Guidelines on humane slaughter and euthanasia. Aust Vet J, 1987;64:4-7.
  • Blackmore DK. Energy requirements for the penetration of heads of domestic livestock and the development of a multiple projectile. Vet Rec, 1985;116:36-40.
  • Daly CC, Whittington PE. Investigation into the principal determinants of effective captive bolt stunning of sheep. Res Vet Sci, 1989;46:406-408.
  • Grandin, T, and Smith GC: Animal Welfare and Humane Slaughter. [View Web site]
  • Practical Euthanasia of Cattle: Considerations for the Producer, Livestock Market Operator, Livestock Transporter, and Veterinarian. Brochure prepared by the Animal Welfare Committee of the American Association of Bovine Practitioners, 1999.
  • 1993 Report of the AVMA Panel on Euthanasia. JAVMA, 1993, Vol. 202, No. 2, p. 230- 249.
  • 2000 Report of the AVMA Panel on Euthanasia. JAVMA, 2000, Vol. 218, No. 5, p. 669- 696. 
  • American Veterinary Medical Association. AVMA Guidelines on Euthanasia. AVMA, Schaumber, Illinois, 2013. [View Web site]