Rambob my girls are extremely broody. I was lucky to get enough eggs to hatch from them, because I gave up and let them sit. Now? I have a hen with a nest, but she isn't sitting, just guarding. Very weird. And they will only lay in a big covered kitty litter box or a medium sized dog crate. They hate any type of nesting box. Guess they passed on their weird, to your birds.