Parront
Crossing the Road
You are the one who should know! My old Orpingtons had a lot of fat, BTW. The temps in Riverside CA did not come close to yours in the desert, but they did not lay well at over 90 degrees. We were at 105 only a few days at a time back then, I believe it is warmer now.I'm going to buck the conventional wisdom here and suggest that heat tolerance has less to do with fluffy feathering and more to do with body composition. I say this because I've noticed massive differences in fat accumulation and content in the birds I've butchered, and those with more body fat have definitely had a harder time dealing with the heat than my leaner birds irrespective of feathering. Just my two cents of experience.