i am thinking about triing it out, but i want to feed grain (oats) not corn, and i am wondering how well it will gravity feed the grain ? corn runs like water, but grain may be a different story, so anyone that has used one please tell me what ya think ......

fill it and forget it feeder

I haven't tried it but I think it should flow fine. If you read down on the ebay listing under "tips for turkey" he recommends using cereal grains like oats or barley.