These are only 3 months old so maybe it has to do with age. I don't know if there is any other breed that looks like these. They have all Leghorn characteristics otherwise.
Could anyone help me figure out if this 3 month old Leghorn is hen or rooster ? I have 6 and they all look the same except some being a bit smaller than others. No crowing except some play with each other by puffing their neck feathers. Do females do that as well ?