Hi all, I have 10 chickens, 6 ducks and 2 geese who are fed Nutrena All-Flock. I wash, dry, and crush the eggshells and give back to them for their calcium. However, no matter what I have tried to put the shells in, it gets knocked over and scattered about because they weigh so little. I have tried heavy bowls and regular feeders as well as hanging the feeders (the geese ate the rope). I should probably build something to hold the bowl or feeder steady but am neck deep in other projects. Just looking for ideas. Thanks!