I purchased 3 RIR pullets when they were about 4 weeks old. The person I bought them from did the best she could to try to sex them, but there is a definite difference between them. Two are much larger and have bigger combs and wattles.
I have checked out numerous other threads on this site on the subject, but I just can't find a definite answer.
I have not heard any crowing, but on the other hand there are loose chickens all over the place here, so it may be hard to tell. I've been listening, and I haven't heard mine crow yet. I also don't see any spurs.
Any and all help is greatly appreciated!!