Conversation so far:
what was the importance of the Bison to them?
The Niitsitapi main source of food on the plains was the American bison (buffalo), the.
how did they hunt them?
The hunters would round up the buffalo into V-shaped pens, and drive them over a cliff (they hunted pronghorn antelopes in the same way).
why would they drive them over the cliff?
CANNOTANSWER.
what would they do after they had driven them off the cliff?
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Afterwords the hunters would go to the bottom and take as much meat as they could carry back to camp.
They also used camouflage for hunting.
what kind of camouflage did they use?
The hunters would take buffalo skins from previous hunting trips and drape them over their bodies to blend in and mask their scent.
what other technic did they use for hunting?
When close enough, the hunters would attack with arrows or spears to kill wounded animals.

Question: did they use the bison for anything else other than food?
Self-contained rewrite: did the Blackfoot Confederacy use the bison for anything else other than food?