Oregon Revised Statutes Animals § 607.007

(1) “Adequate fence” means a continuous barrier consisting of natural barriers, structures, masonry, rails, poles, planks, wire or the combination thereof, installed and maintained in a condition so as to form a continuous guard and defense against the ingress or egress of cattle or equines into or from the lands enclosed by the barrier. Natural barriers may include hedges, ditches, rivers, streams, ponds or lakes.

(2) “Estray animal” means:

(3) “Taking up” means the intentional exertion of control over an estray animal, including but not limited to the restriction of movement, holding under herd, feeding, pasturing or sheltering of the animal.