I have three Buff Orpingtons and three Barred Rocks that we got in early April. Friends got barred rocks and another type of chicken AFTER we got ours and they are laying and have big red combs. Our girls are not laying, not squatting, have tiny combs.....they get Layena laying pellets mostly, then in the afternoon some scratch and compost goodies. Plenty water and room. Shady spot. No aggression beyond regular pecking order and no rooster. what is the deal?