I would like to get a couple broody hens and a rooster of that same breed, but where do I keep them? I already have 14 Isa Brown hens and if I get a rooster for the broodies, will it go around trying to fertilize the Isa's? (and I DO NOT want that) Also, will broody hens sit on ANY clutch of eggs or JUST her fertilized ones? How will I know which eggs are fertile and which ones aren't? Help! Thank you!