4 of the ten fertile eggs I bought were infertile. The lady offered to replace them with 2 chicks of my choice. Here's the problem... Hers hatched Saturday. My broody is due any day now (hard to tell because with such hot temps outside it could be any day after day 18, which is today) So at the very least the chicks will be 4 days when I introduce them to broody-- but probably more like 6 days. Isn't that too old? And also, the older chicks are going to have to leave the nest for food and water, so the babies we hatch will have to be old enough to leave too, right? Should I wait until they are 24 hours old before adding new ones? Do you think that if I confine them to a small space (2'X4' kennel) the age difference in chicks will be okay? Or should I just forget the free chicks and have her raise the 3 she'll (hopefully) hatch? I do have the other option of getting 2 more 3-week-old chicks to graft on to my mama hen who has 3-week-old chicks... but I've never heard of that working. Thoughts? Advice?