The quicker they feather, the 'hardier' they will be....reducing the amount of heat greatly intensifies feather generation.Yep, all the studies I read keep heat on until about week 4. I do wonder if I'm sacrificing size or some other characteristic in exchange for early feathering.
It's a double edged sword...keeping temps at bare minimum an at the same time trying to keep them from getting chilled. If the temps are kept high, it will take longer for them to 'feather out'.