I can't really add to what the other posters have said. I have a White Leghorn that is currently broody. Every evening when I go out to collect the eggs I take her out of a nest box and she is usually setting on some eggs. I do have golf balls in my nest boxes to encourage the new layers to lay in the nest boxes. Usually the birds will go broody in the spring but can at any time but usually more so in the spring, early summer. I haven't hatched any chicks in quite a few years with a broody. Now I put what I want to hatch in my incubator. I hatch out a lot of chicks every year. Good luck and have fun...