I have several NNs with pea comb and it really doesn't make a whole lotta difference in their heat tolerance. Body composition is much more important. My meatier NNs pant the most irrespective of comb or color.
Thank you for answering my question. I am more interested in the NN's that lay the eggs though, than the meat one's. I think that I would be better off going with the blue or green egg laying ones, as it would be easier for me to tell the difference between them in my incubators. Yes, I have 2 incubators now set to fire up for the spring hatches!

but i designed my home to share all that cold swamp cooler air & send it all out into my open air coop, i designed it to work that way , so all my birds are protected from the AZ heat and this design cools both our home and also cools our open air coop nicely, even my flock who free range all day, do tend to hang around their very cool coop & lay more eggs , plus my design makes it all very affordable, so there is no extra bill for cooling my home and all my special girls 


