My wyandottes have done great in the North Texas heat. The buff orps though, not so much. They pant and stop laying when it gets over 100, sometimes just over 90. The red sex links I have lay well in the heat but aren't the meatiest birds and I'm not sure if it would be accurate to really call them a dual purpose. My Delaware and heratige Rhode Island red both handle the heat ok but do a lot of panting. I think you'll get at least a little bit of panting and drooping wings with any breed in Texas heat but my wyandottes have held up the best. And as mentioned above, my one dark brahma does seem to do pretty well too.
Edited for typos and to add that my wyandottes are ranging from 8-10 lbs at 6 months old, they're monsters!
Edited for typos and to add that my wyandottes are ranging from 8-10 lbs at 6 months old, they're monsters!
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