This is the second night that one of my guinea hens hasn't come home to roost. The same one both nights and I heard her "buckwheat"-ing in the distance somewhere a little before dusk. I was worried that something had gotten her last night, but she returned first thing this morning to join the flock without a single mark on her. Now she hasn't come home again. Is she possibly sitting on a nest of eggs? Would she be getting off of them during the day and then sitting on them only at night?