Help with ID and sex please!

[sunshine4jt]

Chicks were from a school hatching project this spring. We recieved them Easter week. That should them around 8 weeks old. Other chicks in the same group are barred rock, leghorns and rhode island reds. There was supposed to be Easter eggers as well. Is like to know for sure. 1st chick has double row comb tuft of hair on its head and the friendliest of the bunch. Starting to get a jump of feathers on its back make me worry it's a roo? I do have two roos for sure and their waddles and combs are coming in nice and red! I'm including a pic of them too! The other chicken had almost no tail feathers and is white with speckles.

 

[Rose Quartz]

Last pic is a barred rock boy, looks like you might have a barred rock girl in the background

 

[sunshine4jt]

Last pic is a barred rock boy, looks like you might have a barred rock girl in the background

Yes. I have 3 barred hens! The last pic is my 2 for sure roos (RIR too)

 

[Painted Calls]

First two are mixed breeds. The first is a Polish mix cockerel. Not sure on mix for the second, but she's a pullet.

 

[sunshine4jt]

Thank you. How do you know its a roo? I'm curious to learn.

 

[Painted Calls]

Thank you. How do you know its a roo? I'm curious to learn.

I know it's a cockerel because of the comb and wattles development at his age, and because of the wash of red over the wing bows.