I have 10 chickens. Each day they get some bagged feed from Rural King. I usually buy 2 different mixes and mix them in a large "trash can" type container. They also get leftovers and older foods (possibly moldy bread, brown lettuce). Of course they get scraps whether it be egg shells or carrot shavings. They went crazy for the half a sheet cake. Grapes have to be their favorite. I have a grape arbor that produces more grape than we can use. The question is: Is there something I should not give them?