I can tell my males by 3-4 weeks old because they will start having wattles develop. I also noticed that females have narrower combs compared to the males as chicks. I look at the combs really close and see if there is any growth going on or if it is still smooth. Thick legs is usually a good indicator, but my SLW females have thick legs, much thicker than my BLRW females. Also the males in my birds feather in way slower.Oh thank Heavens!!! I was getting very worried based on some other info I got!!!!
Anybody have a general cut off for wattle growth or comb color indicating roos? As in at week X , if the comb is pale and no obvious wattles the bird should be a pullet.