I recently had an 8 month old Olive Egger go broody, and she caused a 6 month old Speckled Sussex to join her. Eggs got out of wack, and after hatching 2 the Olive Egger stopped sitting and taught hers. The Speckled Sussex then hatched the next 4. They range in age from 3 weeks to a week and a half. We are going to have some days/nights next week around 70/33. Will the moms be able to keep them warm as they get bigger? I noticed this morning at 58 degrees the youngest was under mom in the run.