If you want to keep your breeds pure then when they get to breeding age you'll have to separate, you have some wonderful breeds, I know nothing about belgan d'anvers,polish i know nothing about, old english game bantams are wonderful brooders and mothers, silkies are wonderful brooders and mothers, Golden Comets are good layers don't know how they are other wise. EE's are good egg layers and don't know anything else about them, Brahmas are good egg layers, some go broody , they are great with children and are very laid back. Hopefully someone who has these other breeds can help you with them .you diff want to keep your hen to roo ratio at about 10 hens to 1 roo.
I am not to into haveing pure breed chicks because I purchased them at a local feed store so who knows if they are pure breed already. I know my son may want to show polish in 4H eventualy but i was planning on keeping them all together. I do have 2 yards off of the coop that i can rotate the chickens so i can seperate them into two yards. as long as our chickens can be pets/eggs and we can eat the other ones and provide for our family of 6 then we did what we set out to do. we want to become more self sufficiant and have a hobby at the same time. But... when it comes time to hatching eggs I dont know where to even start...I do know that I want more of the bigger chickens to reproduce but maybe a polish egg or two if we got lucky with a hen and a roo with our polish. we got the silkies because of there broodyness but i think one may be a roo. any and all advice is helpful ... Thank you!