That's my problem too - we have dog kennel panels (photos below) for the run and can't keep out the wild bird moochers. The little brats fly in through the chicken pop-door to steal straw and feathers from the nests! They are such a pain and breed like roaches in any little nook or cranny they can build a nest in! Because I have a very little cottage yard and small area for storage we can't buy the 20-lb bags of scratch&peck organic layer for just 4 hens. Our fridge is too small to store the unused portion so we buy smaller 5-lb bags once a month for the 4 hens (2 are bantams) at $8 each bag not counting the $5 bag of organic 3-grain scratch&peck scratch mix. In addition, for the chickens, we get wild bird seed at $7 for 20-lb bag plus the countless fresh fruit/veggie treats we buy at the store when our garden is not producing in the winter. We do the best we can always!