How Much Do Chickens Eat? Posted on March 27, 2015 by Caitlin G. Ever wonder how much feed to buy for your flock? Here are some general guidelines on how much chickens eat. Locate a Nutrena dealer near you! Related PostsFeeding Scratch Grains to ChickensSupplementing Your Chicken’s DietThe right nutrition at the right time for layersWhy Feed Grit to Chickens?