(Salem, OR) -- Cases of bird flu have been confirmed in five mixed-species backyard flocks in Deschutes, Malheur and Wallowa counties. All of the farms are now under quarantine, and the birds have been euthanized. None of the animals entered the food supply chain. Oregon's Department of Agriculture says the recent detections are a reminder that fall migration brings an increased risk of bird flu and flock owners should take extra precautions to reduce the spread of the disease, including keeping domestic poultry away from wild birds.