Our hen has been sitting on a nest that we have broken up many times ,only to have her rebuild another one. She will take an egg that the Gray Swedish laid and sit on it. We are past the 35 days !.We lock her out of the shed to try and get her to give it up.She attacks the other female we have until she gets bored.She follows me all over the yard, will come when I call her,lets me pet her even though she snips at me. She would never even let me get near her before she went broody.Her whole personality has changed.Why is she still doing this and how do we get her to stop? Any ideas?? Thank you!!!