I can't seem to search this correctly. If someone has a link to explain, I'd be so thankful. I have 20 hens, 2 roos and one of the hens is semi-broody. I would like to hatch some of our own eggs later this winter but am ignorant as all get out! When I'm ready & a hen seems broody, do I just remove some from frig, bring to room temp and slip them under her butt? Not knowing which are fertile or not makes it kinda a crap shoot, I guess. Can anyone help me? THanks!