I use a 25kg feeder with a spiral on the bottom and the hens have no problem at all and they soon learn where the food is, the only thing i have found is that you have to use the larger pellets as the small ones fall too freely, but grain doesn't, I have also made them from 10kg feed buckets and got the spirals from game feed supplier or agri supplier, make sure the feeder is under a bit of cover it stops everything getting wet on the floor as you will have some spillage. hope that helps