Buff Orpingtons are 4 weeks.

[BrittBergh]

Any way you can tell the difference between male and female with this breed at 4 weeks? I hate waiting and they all look the small, two have small tails feathers than the rest. For the life of me I cannot tell if any comb is more red than the next comb and they are all different shades of buff color. Some legs seem bigger than others and one has two different size legs I swear!!!
When should I be able to tell what I have? I have five of these ones and no clue if I have boys or girls like I can tell the barred rocks.

 

[jamie7100]

If there are males, you will start to notice growth and reddening of the comb and wattle development within the next 1-3 weeks. Your pullets will continue to have small, pale combs and little to no wattle.