Gee! The settlers, while heading West, used buffalo chips (dung) to cook their food and stay warm.
Have you ordered a couple of pounds recently for nostalgic reasons?
Cowboys, too. A song half-remembered from my youth:
All day on the prairie in the saddle I ride
Not even a dog, boys, to trot by my side,
My fire I must kindle with the chips gathered 'round
And boil my own coffee without bein' ground.