Hi - I am about to start my third ever hatch. A friend and I are setting 42+ eggs for our students. We both have flocks and keep the chicks. I have one great hatch and one miserable hatch under my belt. I was wondering if some breeds are harder to hatch than others? I know shipped eggs are tougher than fresh, but what about breeds? We are setting: Araucana, EE, Olive Eggers (Ameraucana x Maran), Shamo, Barred Rocks, Orpingtons, and Polish. Whats yor opinion!