Oregon Revised Statutes Crimes and Punishments § 167.345

(1) As used in this section, “peace officer” has the meaning given that term in ORS 161.015.

(2) If there is probable cause to believe that any animal is being subjected to treatment in violation of ORS 167.315 to 167.333, 167.340, 167.355, 167.365 or 167.428, a peace officer, after obtaining a search warrant or in any other manner authorized by law, may enter the premises or motor vehicle where the animal is located to provide the animal with food, water and emergency medical treatment and may impound the animal. If after reasonable effort the owner or person having custody of the animal cannot be found and notified of the impoundment, the notice shall be conspicuously posted on the premises or motor vehicle and within 72 hours after the impoundment the notice shall be sent by certified mail to the address, if any, where the animal was impounded.

(3) A peace officer is not liable for any damages for an entry under subsection (2) of this section, unless the damages were caused by the unnecessary actions of the peace officer that were intentional or reckless.