It's cold outside and I have one hen that comes in and sits on the couch. She isn't laying any eggs. She has the same attitude she gets when she is broody. She goes out to poop then fights to get back into the house and to her spot. She is around 2 1/2 and the friendliest hen I have. I have only had chickens for as long as I have had her and this is just new behavior. Is she getting old? Is this normal?