Update - Help identify chick breeds.

[Chicken Girl]

The first one maybe a Production Red or New Hampshire Red (just throwing a guess out there ).

 

[Misskyo]

Tsuki is actually darker than the picture shows, same with the one in the first pic, my camera just would not pick up the right lighting.

 

[wishing4wings]

Where did you get these chicks? It helps to know if they are from a hatchery or may be barnyard crosses.

Jaiden might be a buff Cornish. Looks very solid and stocky. And you said it is heavy!
I'm not sure of Tsuki's breed, but thinking it's a cockerel. That's a lot of comb for such a young chick.
Oddball is a Salmon Favorolle. You will need to learn how to trim and shape her beak or she will have trouble eating.
Nero looks like a Wyandotte.

 

[Misskyo]

They are from Hoover's hatchery and all are supposed to be female so hopefully she's just a masculine young lady lol

 

[21hens-incharge]

In my batch of ten from a hatchery I have one confirmed boy. Also all are supposed to be girls.

 

[Misskyo]

Well than I really hope s/he is the only one lol. We just had to get rid of a bunch of roosters from our free range mutt flock.

 

[wishing4wings]

They are from Hoover's hatchery and all are supposed to be female so hopefully she's just a masculine young lady lol

Most hatcheries will only guarantee 90% accuracy for vent sexing chicks, which is as much art as it is a skill. Of course sexlinks and autosexing breeds are almost 100% sexable. I looked through Hoover's available chicks, and did not see buff Cornish, so Jaiden must be something else. What was your order from Hoover's? I saw the assortments they offered and we might be able to narrow it down. Hoping Tsuki is a pullet!!