So as of yesterday, 17 chicks hatched. There is an 18th pip but no further movement so that chick probably died. Looks like 16 all have one of my Dominique hens as mothers as they look just like purebred Dom chicks. The other one is one of my neighbor's eggs so no idea what it's parentage is though it's related as her chicks all came from mine.
This means no eggs from my remaining 2 Dark Cornish hens hatched because those chicks would have been brown with dark stripes as the rooster is also a Dark Cornish bird and that's what purebred DC chicks look like. Still, they are awfully cute. I'll have to try for purebred DC later this year.