I recently purchased 10 chicks, here are pictures or 8 of them, (the other ones were annoying and trying to squirm away), I know it's far too young to tell for sure, they are around 3 weeks, thanks
Number seven is already looking like a cockerel. However, they are about 3 weeks too young to start making accurate guesses. Please post pics showing combs and wattles, at 6 weeks.