I would welcome any ideas to rid my duck hut of raiding wild birds. My hut has a full size "person" door that is open all day so my ducks can come and go. This allows my ducks shelter and easy access to their feed. The problem is it also allows the same for wild birds. They are eating all the duck pellets and filthing (is that a word?) up the hut. It seems to me any opening large enough for the ducks will allow entry to these thieves. Help?