Marans experts: I have three of my NYDH marans from crfarms that are obviously roos. One is even crowing. Can I assume that they are all obvious by now or do I need to worry about sneaky late-developers? I have never had single-comb birds other than my Favs.
Some are sneaky..... I often find 1 in my pullets about about 3-4 months. But once I move them to the BIG growout I can't keep a eye on them as well.