This thread might help you with some of your worries.
https://www.backyardchickens.com/t/947046/broody-in-michigan-winter
I never did read that the hen is actually broody. If she is not broody in that tight space she is a threat to the chicks. She could easily kill them instead of keeping them warm.
https://www.backyardchickens.com/t/947046/broody-in-michigan-winter
I never did read that the hen is actually broody. If she is not broody in that tight space she is a threat to the chicks. She could easily kill them instead of keeping them warm.