I got mine when they were 12 & 15 weeks old, so I never saw them that young. The two boys were 12 weeks and the five girls were 15 weeks. One thing I CAN tell you for sure, though, is that the boys will have noticeably more developed combs than the girls, and the girls' tail feathers will be more developed, rounded at the ends and more full-looking. Here are some pics from when I first got them for reference:Hey @MissLavender! Do you (or anyone else coming across this thread) have pics you can post of the mosaic cockerels vs pullets at about 7-8 weeks? I have an opportunity to purchase some grow outs here in CO and I’d like to do my b.est in picking out one cockerel and rest pullets!
12 week old boy
15 week old girls
ALSO, if you do plan on breeding Mosaics, don't breed whites to whites! When you do that, you start to lose the fibro coloration, resulting in white skin and bright red combs in most of the next generation. If you have a predominantly white rooster, you'll want to use primarily darker hens with exceptional fibromelanosis (blue/black skin) expression. If you have a rooster with a lot of dark coloring and a nice, black comb you'll want to breed him to primarily lighter hens. This will help preserve the blue skin and turquoise earlobes unique to this beautiful breed.
