You've received some good advice. I can't comment on breeds specifically except to say that if you're getting your hens from a hatchery, they may or may not go broody. Yes, some breeds are known more for broodiness than others - bantam cochins for one. They can be crazy-broody! The last BO I had, only went broody once in the 3 years I had her, and then it was too late in the fall, and she was in a bad place. So, I moved her after she'd been setting for a week, and she went bonkers. I moved her at night, as recommended, checked on her in the morning, and she was off the nest, most of the eggs broken. She never went broody again. If you want to hatch your own eggs out, get an incubator. That's the only way you can be sure to hatch chicks at a certain time if that's what you're looking for. Don't count on getting a broody, even if you get a breed known for it.