My second Silkie went broody on me about a week ago but I haven't put any eggs under her. Everytime I go in there, I pull her out of the next box but she's back in there within minutes. Her sitting doesn't bother me apart from the fact that she's not eating or drinking much. So my question is........how long will she sit? Will she jump up after 21 days and get back to normal or is she going to sit there until she sees chicks?