That's interesting. Simply as a function of the size of my trays, I feed about half of my sprouted seeds (barley, wheat and sunflower) when they truly sprouts (day 3) and the other half, after they have gotten green shoots (day 4). The chickens definitely prefer the day 3 fodder, but still enjoy the older shoots as well. All and all, the sprouts/fodder are only about 1/4th , at most, of their diet. Everyone's healthy, they like it, and it seems like some grass/sprout matter would be a normal part of a birds diet, so it's working for my flock. I toyed with the idea of upping the fodder rations in the winter where they have no other green forage options, but decided instead to integrate some small amount of alfalfa into their fermented feed. So far, so good.