My hen started setting on 6 eggs the 19th of july. She kept laying and added 6 more eggs, total 12. On August 7th 3 chicks hatched out. She is still setting on the unhatched eggs. The 3 chicks are doing fine. I candled some of the unhatched eggs, they are brown eggs and not real easy to see the insides. Some of the eggs were completely full of a dark shadow. Some had a dark spot about the size of a small marble. What does this mean? Should I let her keep setting or take the eggs from under her ? If I need to take the eggs from under her do I do it now or give them another day or two? Thank you for your help with this!