Awww!! So cute how they huddle close together like that... maybe to keep warm until they finish growing feathers? I love your picture!! Thank you for sharing!
I don't think they're cold. It's more that the hens only tolerate them at a certain distance, so the chicks are trying to keep some space between them. The dark brown bird in the center is the dominant hen. Ever since the chicks started roosting she's posted herself in the middle, like a referee between the two sides, to keep the peace.
