I would think an 11,500 year old bison would be pretty tough. And hard to butcher.
Wily, able to outwit or outfight predators for 110 centuries? Probably have to shoot ‘em from a chopper.
I’d think you would have to slow cook the meat for a few centuries.
A Texan could still make great barbecue from it :)
Try to imagine butchering a buffalo with stone tools.