Oregon Revised Statutes Animals § 600.150

(a) “Pig” means a porcine animal of a type maintained as livestock.

(b) “Turning around freely” means having the ability to turn in a complete circle in an enclosure without an impediment, including a tether, and without touching any side of the enclosure.

(a) Lying down and fully extending its limbs; or

(b) Turning around freely.

(a) That is being transported;

(b) In a rodeo exhibition, a state or county fair exhibition or a similar exhibition;

(c) During the slaughtering process;

(d) During lawful scientific or agricultural research;

(e) During an examination, operation or test by a veterinarian or during temporary treatment for veterinary purposes; or

(f) In the seven-day period before the pig farrows.