Fermenting chicken feed, as with anything, creates good bacteria that is very beneficial to your birds. Lacto-fermenting boosts their immune systems and helps keep most diseases at bay along with keeping a healthy digestive tract. The same as what fermented food does for people. The fermentation process raises levels of vitamins B, C and K (by the break down process) and can boost usable protein up by as much as 12%. Your not fermenting it to an "alcoholic" state, your just breaking down the food and getting the good mother growing in there and just until it starts bubbling. We ferment our girls layer and since its pretty cold up in Alaska during the winter(that's an understatement!), we throw in scratch and BOSS just to make it look a little more appealing than just a bowl of wet mush and it gives the girls a little added protein and energy. My mother-in-law swears by this method and has been raising chickens for 45 years. Basically, its not going to hurt them. I have personally not noticed the decreased smell or less poo that everyone talks about, but they really do love it! Wet feed in general, even if just soaked for a couple hrs, is easier for chickens to digest and takes much less energy therefor, less feed.