I was thinking that you might be able to get away with two Roos and twelve hens if the roosters were older. Two cockerels with twelve hens would be a real life NIGHTMAREWelcome to Backyard Chickens! We are glad you joined the flock!BYC is a helpful site providing all the information you need to know about poultry! There is always space for more members on the BYC roost!
I agree with @Abriana that one rooster is enough per ten hens although I kept one rooster with two hens and there wasn't one feather missing from them. He mated each hen only about once a day but all roosters are different. Hope you enjoy it here as much as we all do!