(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. [1985 c.289 § 2(1),(2)]