ORS 609.405: Requirement for destroying dogs and cats.

(1) No city or county or any facility with which the city or county has contracted to perform animal control functions and no humane society shall cause a dog or cat to be destroyed except by lethal injection of sodium pentobarbital or other substance approved by the Oregon State Veterinary Medical Examining Board.

      (2) If a particular dog or cat to be destroyed poses an imminent threat to human or animal life, making use of lethal injection of sodium pentobarbital inappropriate, a reasonable and appropriate alternative may be used. The alternative method may be subject to review by the Oregon State Veterinary Medical Examining Board.