that's what i was talking about--sure helps when you spell the name right.--there is an adjustment for the weight of full grown birds, most keep it fully open for a few days then adjust it after the chickens become used to it.--add a free feeder when you have chicks. I so want my DH to build me one.
For your mice problem ,If It were me, I would build or buy the treading feeder-grandpa feeder. Chickens have to stand on a platform for the feeder to open up-seachBYC for plans. Voila, feed saved--and since mice and rats pee continuously-so they can find there way back-your saving your flock...