Because they had access to them.
They hunted and fished.
Anyone with special dietary requirements such as people who can't eat certain foods e.g. allergies/intolerances, people who choose not to eat certain foods e.g. vegetarians and people who need to eat certain foods e.g. diabetics.
Salmon, Elk, wapato root
They can eat all foods. They don't have any religious reason not to eat a certain food.
Slugs will only eat when certain factors are right. They will only eat certain foods at certain times in their diet.
hot dogs
because you like them or you are American
Analyzing Influences
There are no foods that you shouldn't eat during your period, you can eat whatever you would eat normally. Unless you notice specific problems with certain foods then there's no reason to limit what you eat.
Eat them. incorporate them in foods you DO like,disguise/dress them in other flavors.
Some foods may be harmful.
they ate salmon bears deer and whales