Roo or hen?

[kstaff12]

I have two 9 week old chickens. I'm not sure what breed they are. My kids' school hatched them. What do you think, hen or Roo?

Chick #1

Chick #2

 

[kstaff12]

Here they are at 7 weeks old

 

[BantamFan4Life]

Black Ameraucanas. First one looks like a pullet, the second a cockerel

 

[drumstick diva]

first pullet - second cockerel - beautiful birds