From what I can tell from the pictures they are all girls. I look at saddle feathers (in front of tail) rounded are girls really pointy feathers mean rooster I also look at the hackle feathers just behind the neck (not on the neck) under the neck I look for rounded or pointy feathers on hens and roosters the neck feathers will look pointy. What I did was look on the breed page at roosters and you will see the saddle and hackle feathers those are what I look for when looking at chicks. I don't see any real red combs or waddles on those chicks. the 2 black with red on the chest are black sex links the one with feather feet is a cochrin and the other I think is a brown leghorn.
