You can always count on solid GIF's from
@ColtHandorf
I agree with all this, and would wager both mystery chicks have a high likelihood of being pullets, but too early to tell. Looks like a fibro EE or another type of hybrid color layer.
For future reference, what is really good practice is to take note of ALL of the breeds available when you are picking out your chicks. This way even if you don't get what is labeled, you'll be able to easily narrow it down. We don't have a TSC in my region, but my hours on BYC tell me they are very sloppy with their chick handling and chicks moving from one bin to another. We have Wilco and Coastal, both of whom lock the tops of the bins so folks can't reach in and mix up chicks.
anyway, there is hope yet - except for the Wyandotte in the back pic. That is a cockerel.