When a hen goes through the molt, she will stop laying eggs and her feathers will fall out. She will also become very broody, meaning that she will want to sit on her eggs constantly. This is because she needs to conserve her energy in order to grow new feathers. As a result, she will become more aggressive and may even attack other chickens if they come too close to her nest. When a hen is in molt, it is best to leave her alone so that she can fully focus on growing new feathers.