We are reasonbly new to backyard chooks. We bought special feeders for the coup to ensure we could keep the pests away. They worked excellent initially but one of our girls has decided she only likes the black seeds in the layer mash and has worked out how to pull all the food out of the feeder to pick out her favourite seeds. This not only causes loads of wastage but we now have a pest problem which is what we were trying to avoid. We even got an additional attachment over the feeder to try and stop her pulling the food out but she still manages to spill it everywhere. Any ideas? Changing feed perhaps? We will try anything.