Within hours of each other. I am absolutely positive, as she has eggs that are distinctive from all the others. No wonder she was freaking out on me last night at bedtime. I cleaned out the coop this morning and found a stone cold Maisie egg in the nesting box. Amazing!!! She is a 7.5 month-old Barred Rock who lays almost every day. Go, Maisie! I told her she could take today off.