Help sexing and breed ID my 6 week old chicks!

[Rosiered2020]

picked these up from the “assorted bantam” bin at tractor supply. I have never owned chickens before and am uncertain what they may be!

 

[Three Little Bunnies]

I have the same issue, although I am pretty sure three of mine are Cochins. Good luck!

 

[FuzzyCritters]

Both pullets. I'm not sure about the first chick, but it looks like a buff sebright. The second one is and old english game.

 

[Rosiered2020]

Both pullets. I'm not sure about the first chick, but it looks like a buff sebright. The second one is and old english game.

Thank you so much