I was reading the post by Smartie_Pants, regarding her spread out hatch (https://www.backyardchickens.com/forum/viewtopic.php?id=261008) and one of the answers was that 13 eggs may have been too many. I don't have a broody but do have some BO pullets and had planned to put a few eggs under them if/when they do go broody in the future. So I'm wondering, what would be considered a good number of eggs under a standard sized BO hen?