TW, have you checked your chicken's stool since feeding the flax seed? I had added some last winter just to see what would happen, if anything, but found flax seed being passed through the digestive system undigested and expelled in the feces. As the FF is already increasing the Omega-3 of the regular grains, I don't know how much is being accomplished by adding the flax, particularly if it is not being ground up in the gizzard due to being too small, too slick and too hard to be penetrated by the fluid of the FF. Are you adding ground flax or the whole seed?