I have been feeding FF since 2015. I had a 8 year old hen hatch 9 last week . She has been eating FF her entire life. Doesn't seem to have done her any harm.Unfortunately not true! I have fermented mine for 30h and it is highly alcoholic. I just tried a bit of the water the feed is fermenting in and it's gone to my head straight away. I took the food away from the chickens immediately. They love it, but I don't want to damage my beloved chickens.