I have four 7 week old chicks that I can't figure out if they are pullets or cockerels. I don't see any pointy hackle feathers but I am not sure when they would show up. Two of the grey ones have some light brown feathers coming in on their wings and the reddish one has some green feathers in the tail but I am not sure if that is due to their breed. This was our first time hatching eggs and we are hoping to keep 2 pullets. Any help would be appreciated. The 3 greys are Splash Ameraucana/Buff Brahma crosses and the reddish one is a Swedish flower hen/Speckled Sussex cross. Thanks!!!