We have three chickens that live in our fenced in garden area (for their protection, our dogs aren't to be trusted). It is 20' x 90', mostly garden dirt but with grass they nip at through the chain link fence. There are standing raspberry bushes and we also left the corn stalks standing, to provide them protection from predatory birds, for the winter. We feed organic layer pellets, and bring them a handful of whole wheat kernels when ever we go out to see them (we get buckets for free!). We also bring them greens, squash, and other things when we have extras, which they love. Do they need anything else? I'm especially wondering about calcium. They have been laying for just over a month and are doing very well, but I don't want to compromise their health by not giving it if they need it.