Hello, and welcome to BYC.
That will most likely be a temporary situation. It's good to see that you have a 'PlanB' in mind for the cockerels. Males that size, gang mating pullets can cause injuries.For some reason my 2 hens are super dominant. We had a Roo with them for a long time, and he passed, and they were single for about 5 months..... Then we hatched these Raptorsand sheesh these hens chase the @&#& out of these roos.