Grocery stores throw away perfectly fine veggies every day as they're stocking up in the produce section. They are more than happy to give away all you need and more for your chickens. I've even gone to the back of the store and loaded up on heaps of "scraps" for composting projects. ( Our area is looking to start a program for collecting all of this green waste to be then made into compost! ) If you are paying for cabbage, etc. please consider keeping greens out of the landfils ( where it gets cut off from oxygen thus producing bad carbons that damage our ozone layer. ) Plus, it's free treats for your flock!!