Of course there are differences, since they originally come from diffrent areas of the world. The natural climate is different in each place, and for most far different from here. But unless you keep them in a climate controlled building, there's not much you can do but give them some type of shelter. In their native enviroment, I'm sure reeves, amherst, ring necks orred goldens all eatdifferent things. But i have been raising them for years, and I feed them all the same: cracked corn, wheat, meal worms, turnip greens or cabbage. Unless your are going to spend thousands creating their native habitat, providing them proper nutrition, shelter from rain and wind, is about as good as it gets.