Glad you got food for them! To cut back on feed costs, remember chickens (full grown) can eat just about anything we can eat. I don't give mine citrus, but that's about it. I give them the chicken carcass to clean (after I make stock even), meat scraps we don't care to eat, any leftovers no one seems interested in just before they start to go bad (after usually 5 days in the fridge, if no one touches it, it goes to the chickens). I also give them weeds from the garden- my chickens free range so I don't mess with grass clippings or anything else, but if you don't range yours they can also eat FRESH (not dried) grass clippings in smaller amounts as well as trimmings from other plants. Just be wary- certain plants, like lilies of the valley and daffodils, can be toxic to chickens in large amounts. If they range and have access to them they seldom cause problems (mine have access to lilies of the valley but never have a problem), but if you have chickens in a run w/out access to greens and throw them a bunch of something they'll eat more of it, potentially causing problems. Just know what you're feeding them if it's not something you would normally eat, and when in doubt, don't give it. But supplementing can really cut back on feed costs when it's stuff you have around your yard or that would normally get thrown away!