i have a buff orpington who has been acting strangely for the last week or so. The hen has been up in a nesting box almost constantly. She has been making low clucking sounds and puffing up all her feathers when ever i go in or near the coop. I don't think she's egg bound: She's been able to pass fecal matter and doesn't have any blood, puss or as far as i can tell swelling around her vent. Buff orpingtons aren't brooders are they? Could she be ill? Any thoughts on what I should do? Thanks.