You have to keep them separated during the breeding season, and for at least 4 weeks before that, too. There really is no other option when you are breeding several different kinds of chickens, or even two different kinds of chickens. If you don't keep the hens from breeding with other roosters you are likely to get a mix, and you may not even know it until the second or third generation. I know this isn't what you want to hear but it's reality. They need separate coops & runs.