What are these 15 week old pullets?

[HomeByBonnie]

Thank you!
This my chicken math flock! It keeps growing and growing with no rooster in sight.
I believe you are correct about the Dark Cornish looking at the comb.

 

[Veer67]

Brown leghorn
I though barnvelder for the second bird, but I'm not really experienced enough with them or dark cornish to tell them apart. Must be this afternoon's research project!
Partridge rock--those are such beautiful hens!
White rock. Way too thick to be a leghorn.

The Dark Cornish and Barnevelder part was a bit confusing too at first but eventually I decided Dark Cornish because of comb and the body structure.