At 5 1/2 weeks I can tell 7/9 are boys. They have bigger pinker combs and they participate more in the pecking order as well as often being larger in size. I have had a late bloomer in the past. But by 6 weeks, usually have a VERY good idea. Also can tell who will be crested by this point.
Very nice and congratulations! SFH start to show their gender pretty good by weeks 5-6 though some can be discerned earlier. But it's in the comb/waddles/behavior not feathering at that point. They have been a mixed bag of curious/ friendly to the opposite end of the spectrum for me and down right flighty. In my huge flock it's been difficult for the SFH to stand out. But with recent reductions, the hens are coming around more.
Make that hen because my other one was lost recently to egg binding after being broken from broody. 
The straight run chicks I got ended up being 5/8 boys. Just makes the girls even more special! 
Very nice and congratulations! SFH start to show their gender pretty good by weeks 5-6 though some can be discerned earlier. But it's in the comb/waddles/behavior not feathering at that point. They have been a mixed bag of curious/ friendly to the opposite end of the spectrum for me and down right flighty. In my huge flock it's been difficult for the SFH to stand out. But with recent reductions, the hens are coming around more.
Curiously, I'm gonna call 2nd from the bottom on the left a cockerel due to coloring. So far when I see the bright stuff coming in early it's a good indicator.
I excell at hatching boys. So far for SFH my first hatch was 7/9 boys and second (broody hatch) was 2/2 boys. So 9/11 boys and 1 of the 2 girls was taken by a predator.
) Personality wise they are all pretty confident. I don't see a real leader out of the bunch. In fact one with a comb is a little more shy. 
Ha Ha I pick boys every time. That's why I wasn't going to hatch. My last pick of 4 straight run were 3/4 boys!
I have 2 with more of a comb then the others suddenly and those are my guess for boys. (2/7
I always say I'll know when they crow or lay an egg.
So you better stick with if it lays an egg. 
Ya know! Couldn't they just hatch with a little sign.Well, some females crow.. and my males actually sing the egg song when they get startled well enough or sometimes with the girls!
"I'm a girl!"
Ya know! Couldn't they just hatch with a little sign.
