How big is the interior of the coop? Does it allow four square feet per bird? You have five birds so you need 20 square feet of unencumbered floor space, not counting nests, waterers or feeders. If they are crowded, they won't go in. I can't tell from the pics. I agree with everyone else, it sure is a cute coop! But if it's too small that might be the problem. Hope you get this sorted out!