Okay, so I looked this question up. Because I have a hen that has been sitting on the nest all day, and we got rid of the Rooster about 8 months ago if not more. For some reason all my hens like to lay in the same nest...they have 5. And she has kicked everyone out. So can a hen get broody without a Roo?
Yes - hens can, and do, go broody without a rooster in the flock. Broodiness is purely hormonal on the part of the hen.