Hi, I am a newcomer. Have 6 chickens for eggs. (Got a home for the roosters.) They have 1 hour in the morning and 1-2 hours each afternoon/evening to eat in our large back yard. Their crops are visibly full near dark. Is it possible that they don't eat much of their regular feed because they have had enough to eat? ( yes we have a few worms and much foliage for them.) We monitor their feed and they rarely eat much of it.