I have one of Al's feeders
positives -- it is well made from almost all metal. It was quick easy to assemble and has lasted well, it was reasonably priced, it is easy to fill and the chickens quickly learned how to use it.
negatives -- it goes "ker-clank" when they step on it, it is loud. My birds are messy eaters and beak food out of it, Al made suggestions about restricting the amount of food that drops down with a cardboard insert but it didn't work well, I could do with a grill or something so they can't root around in the food. My dog raids it at night, she learned quickly to step on it and gets the food out... I put a brick under the peddle when I put them to bed but she has learned to push the door open. My smallest girl is pretty stupid and couldn't figure out how to use it without falling off the peddle. I made a bigger step and she can use it now. It is narrow and at most two birds can get to it at once and often they fight and push each other off it.
Sylvester, we have crows, doves and sparrows and a mocking bird my husband is really done with. The doves and sparrows are nesting in the tree above our chicken run. I'm sure they are thrilled with the fresh water and chick food currently on offer.
THANKS FOR THE INPUT! WE HAVE MORE THAN ONE FEEDER IN THE YARD SO THE TIMID GIRLS GET A CHANCE TO EAT WHEN THE PUSHIER GIRLS ARE HOGGING ANOTHER FEEDER. BRITE TAP NIPPLE VALVE WATERERS SOLVED OUR WATER PROBLEM FROM THE WILD BIRDS WHO HAD BEEN POOPING IN THE OPEN BOWL CHICKEN WATERERS. SO NICE TO HAVE CLEAN WATER FOR CHICKENS NOW.