I agree Kim. My neice's boyfriend is a Chippiwa and I have talked to him about his people's native/traditional diet. They live in N. Minnesota so you can imagine how cold it gets up there. They did not practice agriculture but lived off of fish and game primarily. The only grain they had was wild rice and that would have been only in some seasons. Other than that, they ate berries in season. Meat/fish isn't dependent on seasons, it would have been available year round.

I have a feeling that mankind's traditional diet was heavily altered a couple thousand years ago and again in the last 50 years, with food industrialization. We're now eating far more starches and sugars than humans have ever eaten.