In my flock of 20 chickens I have one New Hampshire red that I think might be a rooster. It's not really any noisier than the others, but it has a more developed comb than the others, and it's the first one in/out, and it stands taller than the rest. Maybe I'm just paranoid that I didn't end up with 100% pullets?
They're all 4 months old.
They're all 4 months old.