Search results for query: *

Unless the hatchery tells you what breeds were crossed, no. Cackle says they use RIR rooster and BR hen: http://www.cacklehatchery.com/blacksexlinkpage.html Purely Poultry & McMurray don't say: https://www.purelypoultry.com/black-sex-link-chickens-p-369.html...

I don't have any experience with them, but an all female flock should be fine for kids.

It's not really a breed, it's a cross that produces black female chicks and a different color male chicks so they can be sorted without vent sexing at hatch. So it's impossible to say for certainty what you're getting other than black female chickens.