The backyard flocks in Washington and Oregon were euthanized after necropsies were done on chickens that had died suddenly. The sudden deaths were found to be from AI and the remaining flock members euthanized. At least that's what I'd gathered from all of the talk on the PNW groups that I'm a part of.When it showed up in the Pacific NW area a while back, the information that I read said they were slaughtering all the birds in the zone. They tested later, not before they slaughtered. And they were backyard flocks, not commercial flocks.
Some of the newest info that I have seen on the outbreak in MN and MO has been that they are no longer sure that it came from migrating water fowl. One theory has been that it was brought in through humans. But even that was not for certain. And they are still trying to figure out how it went from the Pacific Flyway, but then skipped over the Central Flyway and then was found in the Mississippi Flyway.
We also are not going to get all the information out there and for all I know, we may be getting fed a line of bull right now. It is not in the best interest of the government to be forthcoming on many things.
The furor here over AI has died down significantly now. It just hasn't been as big a deal as people thought it would be, kind of like the whole ebola thing. There aren't any new cases in Oregon and I haven't heard about any new ones in Washington. The most recent case was down in California on a free-range turkey farm.