I got my first half dozen chicks (ISA Browns) in February, lost 3 and added 6, so now I have 9. The three older ones are laying an egg a day each virtually every day. The new ones are not laying yet. I built an 8x8 walk-in coop with 12 or 14 built-in nest boxes and a good sized fenced run. I feel like I have room to grow and diversify. I'd like to add some different looking birds. The ISAs are pretty plain. I'd like to add a rooster (more than one?) because that seems natural and also interesting offspring(?) and the occasional chicken dinner. Are the ISAs fit to breed? I've heard they're not the best mothers. If so, what should I be looking for in terms of the breed of a rooster? An other advice or reference materials for someone who wants to transition to a single breed flock of all hens to a more mixed flock that produces chicks?