I have that exact situation, with over 40 standards and 1 lone banty Cochin pullet. She gets by okay and has attached herself to a GLW and my crossbreed BR/Ameraucana pullet, Panda, as her "mamas". She does get chased; in fact, a couple of them were doing tag-team chasing of my poor little shrimpo girl yesterday. She was yelling at the top of her lungs and ran to the rooster, who didn't seem to notice her. Finally, she ran inside the coop to get away and break the cycle.