Sorry but I routinely hatch and grow out chicks and have raised lots of Buffs. Those two cute chicks
are only about 4-5 weeks of age - either that or they have been undernourished - i.e., not fed the
appropriate starter/grower crumbles. I also believe them to be cockerels. Their 'body style', how they are standing and the prominence and dark red coloring in the comb area.
Buff pullets, at least all that I've grown out thus far, are nearly 14 weeks of age when you can see any
growth at all in the comb area and then it is nearly white to very, very pale pink and not red as these two.
Sorry. We've all been 'chicken newbies' at one time and experience is a difficult teacher, keep learning and do your 'chicken homework' next time before purchasing.