With her being off of the eggs for so long I would say it's likely that there will be a delay. A good broody hen will wait for chicks to start hatching, they aren't counting the days so you should be fine even with a late or slightly staggered hatch. Every broody is a little different but most of them will wait somewhere between 1-3 days once the chicks start hatching to give all if the chicks time to hatch.Hello guys, I was wondering about my young broody pullet. She left her eggs for 12 hours. Will my eggs hatch on the 21st or 22nd day? I am California and the temperatures are low 40s.