The administrative assistant from the school provides the fertilized eggs from his neighbor. He picked some up this morning to set today, and he took some from under a broody hen. I candled one from under the broody hen and it looked like it could be as far along as day 18 based on the size of the air cell, although i don't have a ton of experience. The other ones are more recently laid and they are definitely on day 1. I have an automatic egg turner because I can't come to the classroom on nights and weekends. I just don't see how this will work without crushing the hatching chicks in the egg turner. Should I send the further progressed ones back? Will the hen even take them back? There are other broody hens in the coop too. Let me know! I don't want crushed babies in my classroom!! And I want the day 1 eggs to be successful! Also, it's Wednesday and I'm not even going to be at school this Friday and obviously won't be here this weekend, so if those eggs hatch within the next few days there's not really anything I can do. Stressing!