I've had both hens and roosters attack the large combs on some hens. One hen in particular, a SLW, had an extremely elongated comb similar to a rooster's. Until I partially dubbed her, it was being ripped almost all the way off her head by other hens. Since then, her comb and wattles have continued to grow into very male-appearing secondary sex characteristics. One of my roos has attacked what remains of her comb, and I don't let him anywhere near her now.
From my observations, those hens with larger than normal secondary sex features suffer more from both hens and roos. I can only conclude that they're being singled out for looking different.
From my observations, those hens with larger than normal secondary sex features suffer more from both hens and roos. I can only conclude that they're being singled out for looking different.