Ok so I have only dealt with this once but back then I didn't really care if we got a chick or not. Now I care, so now I need info. I have a hen that just went broody two days ago. I had taken all the eggs out as they aren't fertile right now nor do I want mixed breed chicks. But she still keeps going back to an empty nest. This morning I decided to put an egg under her just so she wouldn't leave the nest. I wanted to see how long she would sit on the nest because I know that some new setters jump off within the first week or so I've heard anyway. I am getting two new hens and the breeder says they are both laying and they were both in a breeder pen. So now I am hoping I can get some fertile eggs from them and I was thinking of putting them under my new broody! I have a ton of questions about this. First if my broody "DB" does sit the whole time will she only sit exactly 30 days or will she sit till the eggs hatch? I ask because I won't get my other hens until Friday and even then I might not get the eggs from them(if I am super duper lucky) until next week so if she is already sitting then she'll be a week off from the eggs-I hope I explained my question right. Another question is if she jumps off the eggs and I have my incubator running can I quickly put the eggs in there? What are the chances, if they are fertile and if she hasn't been off them too long of the eggs hatching? Also should I leave that infertile egg under her for to long? I know it will eventually go bad but how long do I have? If I take it out will she get off the nest? I only did it because I actually wanted her to stay on the nest. Oh yeah I don't know if I said it she is a Cochin hen. I can't breed her because of a defect and it was actually funny timing as I just decided the night before I would have to give her up. Then she jumped on my shoulder as if to say please don't sell me. Then that afternoon she started to stay in the nest. I know it was only timing and not more than that but still she is my sweetheart and I am trying to convince my husband she is useful afterall! So any info would be helpful thank you.