Most Summer runs in Oregon come from just two sources so it is a mute point with them. Hatchery fish which were killed on camera outraged sportsmen a few years ago causing hatcheries to re-release them downstream for sportsmen to have a try at them again. In one river, they are stocked in a local lake with no outlet. However, most hatcheries simply let them go upstream above the traps after the money for returning them downstream runs out. They breed with and along side "native" fish. Now that more areas are using fish boxes to raise eggs in the steam, the size differences between "native" and hatchery fish will no longer be different. Same, same.