I have Cornish x, they will be 4 weeks on sunday and not fully feathered yet. I'm asking this for reference for future batches...do they feather out faster in cooler temps, as in just warm enough for them. or do they feather out in warmer temps. I can see logic in both cases, but wondering how it actually works, or if it does not matter at all. I can see if they are just warm enough that the body naturally puts more energy in feathers quicker to keep them warm, thus keeping them alive. I can see that if it is warm, then their bodies have the energy to make the feathers and not have to try to keep the body warm.