I know for a fact that the two females I have are over a year, maybe more, and they have lived in my area (not my property) all their lives. The person I got them from gets his stock from Turkey as well. But I am glad yours do well
The thing with gamefowl, especially Oriental gamefowl, is that they are rather lacking in feather abundance compared to say, a brahma, or most birds really. Like I said above, I keep chickens in a climate that is rather hot. My straight comb birds do a lot better, and even my heterozygous pea...
Since the brahma coop is one of my most well-ventilated ones, it's shady day round, and as mentioned before has cool water for them, I'm inclined to believe it's not coop-related. Orpington and brahma crosses would produce modified peas, which as with the example of my male, cope a little better
My brahmas don't do well in the heat at all. Even my modified pea comb male does slightly better, but there is a clear difference between them and some of my straight combed birds. The temperatures we had two, almost three weeks ago ranged from 42°C-46°C. The pea comb pen had to be hosed down...