Oregon Revised Statutes Animals § 607.300

If cattle or equines break through a fence on the open range and a determination of the adequacy of the fence is necessary in order to determine whether the cattle or equines are estray animals, the State Department of Agriculture shall make the determination of the adequacy of the fence and shall consider, among other things, the customs and practices of good animal husbandry in the particular area with reference to fences. The department may adopt rules establishing fees for determining the adequacy of a fence. Fees must be reasonably calculated to compensate the department for the costs of the determination.