Its awesome to see the feathers coming in and trying to use the difficult chicken calculator to figure out which are roos and which are pullets. At 3 days old just by checking their wing feathers I counted only 6 roos out of 16 that hatched. I guess I will have to be patient to know for sure..
I recently hatched a split batch with a 43% hatch rate after a power outage and other issues. The first 6 come from my BLRW Roo over my BLRW hens and Blue Splash hens. The last 3 came from some eggs I acquired. BLRW Roo ove a Speckled Sussex and a Sapphire gem.