This would work for feeder too, sized to hold inverted 5 gal water jug. Base is lifted to keep them from getting dirt in it. Outside in coop run area. Feeder / waterer on top of sturdy plywood & galvanized awning so can be accessed without entering run
How to make a difference - Cliimate Change and energy - How to make a solar water heater from plastic bottles - award winning system. The Ecologist | Links to PDF DIY instruction guide. Needs translation from Portuguese.