Buffalo (bison) are regularly noted in eastern Oklahoma by Nuttall. He sometimes notes he is following a buffalo trail and at other times someone he’s with may find a buffalo and kill it to eat. Nuttall never describes large numbers or huge herds, however.
Roger Cain who leads the Cherokee Nation Cane project posts regularly in that group’s Facebook account and it is a good place to keep up with river cane and related activities. A question about buffalo eating cane is one that comes up frequently. “Do buffalo like cane?” –The answer, as Roger’s post describes, is yes they did and do.