Conversation so far:
What was the importance of bison to the peoples of the Blackfoot Confederacy?
Historically, the member peoples of the Blackfoot Confederacy were nomadic bison hunters and trout fishermen.
How did the peoples of the Blackfoot Confederacy hunt bison?
The hunters of the Blackfoot Confederacy would round up the buffalo into V-shaped pens, and drive them over a cliff.
Why would the hunters of the Blackfoot Confederacy drive the bison over a cliff?
Before the introduction of horses, the peoples of the Blackfoot Confederacy needed other ways to get in range. The buffalo jump was one of the most common ways.

Question: What would they do after they had driven them off a cliff?
Self-contained rewrite: What would the hunters of the Black Confederacy do after they had driven the bison off a cliff?