I think the "Must overheat the chicks for 4 weeks" 'fact' is the one I find most surprising after seeing babies out in the barn in temps WAY WAY below the "must have" temps. I wonder how that started. Easy to see how it holds on with everyone repeating it including the hatcheries where we get our chicks. "This is the way it has 'always' been done so it is the right way". Except it isn't and hasn't 'always' been.