Of my hens (see list below) the Cochins, BO's, BA's, and Partridge Rocks have been broody. Of these, the Orpingtons have been the best mothers. It's not just whether they will hatch out some chicks, but their position in the flock to consider. My Cochins are too submissive and don't do as well protecting the chicks when they're integrated into the flock (I do this at two weeks or so) as the Buff Orps. The Partridge Rocks didn't stick it out. My best broody is a Buff Orp (Ms. Honey), and she will hatch out a big brood and also willingly take on any chicks that I add to the bunch, which is just fantastic! And she is friendly, but very protective of her kids, and quite devoted until they are old enough to fend for themselves. She's pure gold (so to speak)!