Both of my hens are laying eggs in the same nest. I found 8 eggs in the nest. 3 from my buff bantam and 5 from my dark brahma bantam. The brahma lays very large brown eggs and the buff bantam lays very small tan eggs. If I leave them there will one of the hens sit and hatch them all as her own? I am pretty sure that they will be fertile, because last week I opened 2 eggs that had a small spot that contained blood in the yolk.