Fermented feed takes half the amount of feed you would normally need, so approximately 1/4 cup per bird. In this video I am fermenting two days worth of feed for 27 chickens. I have found that making feed for two days at a time is easier and more efficient. The fermented feed will have a tangy smell to it which is normal! That means the fermentation process is working. Fermented feed is ready by day 3 but can be fed on day 4 as well. Any chicken feed can be fermented. Im using chicken layer pell