I let my chickens out onto an acre lot every day, all day. I'm in northern Alabama, and right now it's 27 degrees F, so frost on the ground. If they free range all day, and I provide feed for them, should I just fill the feeders and let them eat at will or should I put in a set amount of feed and let them hunt for the rest? They spill an awful lot out of the feeder and I'm not able to make my own no-waste feeder right now. I've been putting out feed freely, but sure do go thru a lot of it. They have trees and bushes with leaves under them, so I"m sure they get bugs even at this time of year and the bushes have berries and there's other vegetation, so I'm sure they'd survive even without feed, but I'd like to save some money if possible.