I had read (wish I could remember where!!) that Golden Comets are more prone to respiratory illness and death than others. If I find that post again, I will share.
I have been very careful to keep my coop as clean and dry as possible. I let the temps stay cool as long as the chickens look comfortable. Birds actually have built in mechanisms to shed heat because they overheat too quickly. Warm, moist temperatures are a bacteria's breeding paradise. I also haven't sealed the coop completely to allow for fresh air. If the ground is not snow-covered, I open their little door to come and go as well.
You may already know all of this, but figured it couldn't hurt to share what I do in "The Best Little Henhouse in Cambridge" with my whopping flock of 6. ha ha!!
lol ya we prob will have the min amount that rko requires when you buy i think last year was 6. weve been looking at cold hardy breads as we figured they would be a tougher bird and since comets come from RIRs we figured would be good choices. I too have read about their health probs (mixed stories where some say no prob and others say yes). we also don't plan on sealing the coop we build completely up, unless we would need too figured help with circulation (not that any big gaps etc. will be there lol).
how often do you clean out your coop? is yours an on the group coop or elevated? we plan on doing a secure on the ground (with fencing on the bottom pushed into the ground so nothing can get past the base 4x4s) cuz of space but also the theme we are going with for the build (it will be an upright coop rather than you normal boxed dog house like style).
are you in cambridge, ohio?