Buckeye pullets or cockerels

[Shocki]

I bought these as chicks. They hatched on m birthday. They are just over 9 weeks old today. I ordered 6 and received 7, but I'm only allowed 6 hens, and no roosters. I've been holding off getting rid of any so I don't get rid of the wrong bird/s. There are a couple that look suspicious to me, but what do I know? I'm still new to this.

 

[JedJackson]

I think they are all pullets, but if I had to pick one that looks slightly suspicious I'd say the bird in the second photo. Its comb is a little larger.