I don't know what is going on! I let a hen hatch 3 eggs. After they hatched, I kept her separated with the chicks for a week. She was then allowed back in the coop, and she took her chicks in every night for the past two months without a problem. Now, for the past three days she just sits in the middle of our yard in the pitch black with the chicks. I have to put her and the chicks in at night. She just won't go in! It was raining pretty hard tonight, and she still just sat there in the middle of the yard in the rain. I know for a fact, that the chicks aren't bullied by the other chickens. The other hens don't even chase them off during snack time.