I have a ridiculously named feeder called the PECk-O-MATIC that I love. It took some time to teach the chickens how to use it, but it stops them from wasting their food or fouling it up. I throw treats and scraps directly on the ground for them. I feel it has more entertainment value for them because it allows them to use their natural instincts to scratch the ground while they search for food.
I can't think of the name, but I have a feeder that they stand on to access. Otherwise, it stays closed. It makes noise, but my chickens got used to it quickly. It won't work for chicks though. It will hold a few days of food and it deters waste.