I just came home from a long day to find my hen dead in the coop. She didn’t have any injuries that I saw. She wasn’t acting weird or off leading up to her death. No blood. I’m assuming the heat maybe or she fell off her roost because it was on the ground next to her. But my question is do I need to like sanitize the coop so my other two remain healthy? I’m a first time owner and they are 20 weeks. She was laying consistently before and laid yesterday but today when I got home she was dead outside the nesting box and no egg.