if you hen went broody there is a couple of way to break her first is you can give her an ice cold bath ( no soap) second is you can put her in a dog crate for a couple of days but if you do this the crate needs to be out in the yard in the sunlight
my hens did to but i bought a heating lamp and put it in my coop , then i bought a heater from walmart and put a regular house light in my coop and now my chickens are laying like crazy