My husband believes that once our chicks are out in their runs, they are going to forage for a substantial part of their diet, thus reducing our feed costs. We are raising an egg-laying flock -- Orpingtons, Wyandottes, Ameraucanas, Cochins, Marans, and Barred Rocks -- and I believe that, while they may forage a little and eat bugs and grass, we will still be providing the majority of their food via layer pellets, grit, and oyster shell. My husband thinks that foraging will supply about 50 percent of their food. I see foraging at the most providing 15 to 20 percent of our layers' food. Your thoughts and experience with this? Thanks in advance.