I have a half dozen 7 week old chickens. Am I supposed to be free feeding them? That's what I've been doing. But I went out and their outside food dish - which is a baking pan - was filled *full* this morning and now just after 1:00 it's all but empty. What is confusing me is I could have sworn I have read in different places where people's chickens ate so much they weren't able to stand up anymore? So free feeding - yes or no?