Oh, well hey there! Thanks for the advice. I'll keep an eye on the feathers as they come in and I'll be sure to let the unnamed individual I bought the eggs from know if/when I need more!
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It is impossible to sex by down color in my eyes. But I have a theory that the bright silvery downed chick's feather in cleaner (still just a theory, I am watching closely and time will tell) than the yellowish downed chick's (hen's with less shafting & better stippling/ Rooster with brighter silver and less brassiness). Once they start to feather though you should notice some with wider (more distinct)black stripes and some with thinner (finer) black stripes going across the feathers with stippling. Usually the ones with the wider/darker stripes end up being cockerels in my experience. Really becomes noticeable with age (of the chick I am not that old YET). If I was more computer savvy I could try and upload picture. Unfortunately I am not there yet, It takes a little time to distinguish the difference and I personally still don't cull at that age. I wait until they are fully feathered to cull for being a cockerel or pullet. They change so much when getting adult plumage especially the cockerels hard to tell exactly how clean they will be (at least for me it is). I still like to guess and then mark them and watch what they grow up to be and see if I am right. I do cull for a lot of other things along the way though (crooked toes, beaks, and now size) I have heard some where about the stripes coming all the way to the eyes or something but can never remember how or if it really works. You outta just let the breeder you got the eggs from send you some more to make sure you get plenty of the pullets/cockerels you wantI almost bet they would be free lol