I bought 3 welsummer chicks from Tractor Supply on February 21st, but my guess is they were about a week old when I bought them, so that would make them about 4 weeks old. Two of them have developed faster than the other one, they are almost completely feathered out with comb development although one has a bigger comb than the other. When they were chicks and even now, the two that have developed the most were and still are darker than the other one. The other one is more of a yellow tan color, while the bigger ones were more reddish brown. Idk if that matters with gender or not. I will post pics below in a comment, let me know what you think pullets or cockerels, thanks in advance!