I have never seen hens grow wattles but here in India I find many slaughtered hens with big wattles. They are not roosters but still they grow combs n wattles sometimes. Here it's always warm climate so that's a fact they grow their comb n wattles but I don't know the climate of your area. Still...
Few very few , hens don't have problem but still I saw hens having big wattles and they have difficulty in pecking. Just keep eyes on their wattles and roosters for comb
They needed to dub their comb,
mine are 2 leghorn roosters ... By next week I am dubbing them due to large comb they are suffering breathing problems n one of my rooster nearly lost an eye. For leghorns combs n wattles become their enemy when time passes. You can see their comb ... How big it...