Autumnfisher
As many B/S (or are they blue shoulders?) chicks that I've hatched the past 3 years and watched them mature to breeding aged adults this year,I can sex mine at 3-4 weeks with 100% accuracy,,it's not a guess or rocket science,,,it's those special all blue or all black feathers that comes in all at once(can ya see um?) is the dead give away to the trained eye,,and if anyone here doesn't believe me,,I hatched 3 Opal B/S chicks 4 days apart,,,2 hens hatched out together in my very first hatch of the season on May 20th,,the male hatched May 24th,,,the hens were the first two eggs laid this season,,and the next Opal B/S chick hatched 4 days later is now easily proven to be a male and ithey're only just over 2 months old.I knew before the end of June what sex they were.
When I'm "quoted" here,,I will back up my statement with proof,as I've done before,,maybe some people only raise 1-2 black-blue shouldered peas each year,,I've hatched over 30 black shouldered chicks so far this summer and maybe 20 total the previous 2 years and when you have several to compare side by side the same age or seperated only by a few days in age it's much easier to notice variances in markings as well as coloring.Autumnfisher,,I'm going on the pic you posted and not actually being able to handle the chick,see every feather it has, to know exactly,,,but I will say males develope much more color sooner than same colored b/s hens,,and this too I could prove with pics of my 3 Opal b/s chicks now just 2 months old.These changes are noticable to me at about 3 weeks.My peas are not pets,,but I spend considerable time studying them noticing subtle changes and making notations about it for when it's wingbanding time.