There is a lot of info out there that talks about WHAT to feed your hens, but I'm having a very hard time finding out how MUCH? My hens always seem to be famished although I think I feed them enough...it's winter and very cold, I want them to be comfortable and well-fed. They always have crumbles but I give them other stuff, too, and they seem to be preferring the bird seed I am providing. Perhaps that food is not nutritious enough, and that explains their apparent hunger? I'd rather have them plump, especially in mid-winter, and they seem skinny!