Depending on your goal for having chickens, I would propose you do one of two things. 1. If you don't want eggs, you could rehome the pullet and hope the boys continue to get along or 2. Rehome all but one of the boys and get maybe like 6 or more girls. Of those two options I'd strongly recommend 2, 'cause aside from the benefit of eggs, roosters are a total gamble and bachelor flocks even more so. You might end up having to cull one or more cockerels for human aggression as not all cockerels grow up into nice birds. Your boys also may or may not all get along as they get older too, they also might get along great until one day they don't. Sure, hens can certainly have their issues sometimes, especially during integration, but you're less likely to have major issues