I have a cream legbar/EE mix hen that has become broody. I am sure the eggs are fertilized because I have a cream legbar roo in the enclosure. She started laying at 17 weeks and is only 20 weeks old now. Ever since she started laying she has been hellbent on hatching some eggs even though I collect them from the nest box twice a day. I am thinking about just letting her sit this time, but I was wondering if her age is a problem? All of my hens are the same age, and when they just started laying eggs they were teeny tiny eggs. Now they have increased a lot in size and are medium-sized which is probably normal but who knows they might get bigger as time goes on. Does that make any difference in the egg being viable to hatch? Also, is there anything else I should be doing for her? I am in the middle of building a second coop and run so she will have a private place to go, but it won't be ready for nearly a week. She just started sitting today, and there isn't much I can do other than mark the eggs I want her to sit on and hope the other birds don't give her problems.