Our 24 chicks are doing super! Hand-feeding and spending about an hour a night with our little ones have them jumping on our laps as soon as we sit down! LOVE IT! Anyway, we have a runt of the buff orpingtons and plymouth white rocks. The runt of the BO (we named "Missy") is developing a large red comb where as all the rest of the chicks have pale pink combs which are much smaller - no matter the size of the chicken. Is it possible to tell the difference - without doing a remote control or cell phone test??? LOL! - at 6 weeks old? If so, when and what are the predominate signs? We are new to chickens and LOVE, LOVE, LOVE them! Funny, I told my husband about a year ago that he could have chickens but I wanted NOTHING to do with them as I remembered being pecked terribly when getting eggs by white leghorns and road island reds when I was a child. Now I can't wait to get out each evening when I get home from work to see the babies! Tonight I had a plymouth white rock in my lap for over 30 minutes. She was just talking and talking to me! Oh boy! I am so hooked! Appreciate any feedback to sex determination! Will post some new pics probably tomorrow! Thanks!