It is strange since animal parts properly prepared etc could've been used for storage in addition to societies that had pottery. Even gourds and wood could be used. And being hunter/gatherers once would suspect they would "notice" animals acty strangely after eating some fermented fruit, certain mushrooms, etc or simply by being hungry and needing even themselves experience it. Certainly the weird way some natives "figured out" how to make a kind of alcoholic beverage (chewing crap and spitting and fermenting, etc) is harder than making simple "wine" from fruits? Or "beer" "wine" from rice etc? But maybe not domesticated enough? (But some tribes were fairly location based?)
Oh come on! You're saying they didn't
really use all the parts of the buffalo?
Well I think you'd need a sedentary society to develop rudimentary beer. The various Mound Builders would qualify and were based on corn agriculture, but they were almost invariably located on rivers, so maybe it just didn't occur to them?