bone bits.

Due to the large number of buffalo that would be driven over the cliff, the practice has been criticized as having been highly wasteful. Many of the animals driven over the cliffs did not end up getting harvested as most would rot or go to waste. This was due primarily to the primitive tools and harvesting techniques available to indigenous peoples at the time. Such tools and methods made it impossible to harvest so many dead or dying animals fast enough to beat the onset of rotting, and therefore vast amounts of unharvested, wasted carcasses were left to rot out in the open.