Is this RIR pullet or rooster?

[alexthechicken]

Hi everyone!
I was wondering if someone experienced could tell me if these chicks are male or female.

the one on the right has a small tail feather but the other two do. the one on the right also has a comb

 

[7L Farm]

Red chickens are hard to sexs especially at that age. I have no clue I have 50 red chickens & can't ever tell their sex until there teenagers.