Can anyone provide some tips to keeping what appears to be Barn Swallows from eating my chickens feed??? My chickens are free ranged everyday in our yard. I let them out every morning and leave the pen door open just incase they need some cover from our "friend" the Hawk, who checks out our yard on a daily basis. However the swallows can eat 3 to 5 lbs. of feed a day out of the feeder, and they can fit through the smallest of spaces to do this. Any tips would be greatly appreciated. Thanks.