Feeders.
Love these, gravity no batteries needed.
One sack of 50 lbs feed in. If you are going to be gone longer or don't want have to fill feed again for a bit, get you another feeder. Can put meat bird feed in one and layer feed in another, for example, or scratch and layer, etc.
Makes a great gift too. We have the smaller 7-8 lbs and quart for chicks and brooders.
If you simply don't want to fill feed constantly, get you one or many. The capacity to put the whole 50 lbs bag in the feeder means more space in your storage area. Another wonderful product at TSCTractor supply.