I have Dels, A roo and 2 hens, and 1 pullet, I didn't loose any of my birds to heat of any breed, but they all suffer when it's a 118 degree's with the heat index, and temp is over 100 degree's, and we had 2 months of that this year, in my lifetime I can not remember a hotter summer in Wisconsin, usually we get 2 weeks of hot nasty weather not 2 months, I only run fans add ice to the waters, and spray down the hot sand run during the worst heat of the day, they have shade all day on the north side of the run plus they always have access to the coop.............
I really don't think any breed is better than another with the exception of maybe Jungle fowl, because their natural habitat is quite hot and humid, cold hardiness is the same with the exception of straight comb breeds in a coop that has not enough ventilation or cover.... frost bite would then affect them, . Some animals are just healthier and come through severe heaat or cold, when others just can't make it, no matter the breed.
Kim
I really don't think any breed is better than another with the exception of maybe Jungle fowl, because their natural habitat is quite hot and humid, cold hardiness is the same with the exception of straight comb breeds in a coop that has not enough ventilation or cover.... frost bite would then affect them, . Some animals are just healthier and come through severe heaat or cold, when others just can't make it, no matter the breed.
Kim