So wouldn't you know 3 weeks after butchering all the roos (they got really mean), I have a hen that's gone broody. So without any fertilized eggs, wondering what to do. I see where people place fertilized eggs under the hen. I have a friend who has fertilized eggs. my question is - how long can an egg go before you put it under the hen and it's still viable. We work together, so she would need to collect the eggs, keep them overnight, bring them into the office and then I'd have to wait 10 hours before I can put them under the hen. If I put them in a box on a heating pad, would that be sufficient or do I need to worry about it at all. Basically the turnaround from collection to placing under the hen would be less than 24 hours.