Yes they are probably pullets, except the first one. I don't think they are really pure BOs though (the top one might be). Once I find my book I'll help you out more. The bottom two look a little like my quail d'Anvers (looking at the golden chest and darker body), but again more help when I find my book. Probably in the morning, I'm SO TIRED right now.
Look up something called an Amber or Auburn Link from TSC. The bottom two look a little like those. I have one that looks like that, her mom was a Sumatra Hen/Phoenix Roo cross. Her dad was the same thing but a year older. Her sisters are both black though.