So many choices, so little time.
Upland Bird; Ruffed grouse fed on those weird seeds in their crop.
Waterfowl; Mallard fed in wheat fields.
Small Game; Grey squirrel fed on Filberts [Hazelnuts].
Big Game; Elk fed on whatever. Whitetail a close second.
Freshwater Fish; Trout.
Saltwater Fish; Ling Cod.
Shellfish; Dungeness Crab fed on the most disgusting stuff they can find.