I have that exact feeder! I saw that the chickens had plenty of food one day, then checked 2 days later to find the feeder completely empty except for half of the thing filled with green moist moldy food. It's really weird because I have another very similar concept feeder that I made with a big bucket and separately bought (identical to these ones) ports from Amazon. The inside never even got a teeny tiny bit wet. I guess it depends on the environment but I didn't have a good experience with this feeder personally.