One of our hens got broody, and started sitting on some eggs. The eggs are different days old laid from different hens who she was willing to share the nesting box with. On 3/17 (21 days ago), she was sitting on 12 eggs. Two she hatched on her own, but then she gave up sitting on them. I took the rest home to the incubator. 4 have hatched at home. This egg had these big holes yesterday and hasn’t progressed. I didn’t notice the holes when I opened the incubator (I know it’s supposed to be lockdown, but again... different ages of chicks). Thoughts?