Interesting....

-3 ways that native americans would kill a buffalo with out (before they had) guns-

1) disguise: wearing an animal skin (wolf, buffalo, bear) they would creep as close to the buffalo as possible and the shoot it with an arrow or spear

2) stampede: surround a group of buffalo and cause them to stampede off of a cliff

3) fire: buffalos are fearful of fire (like most animals) and the native americans would make a ring of fire around a buffalo and then they were free to attack it from outside the ring with arrows and spears, maybe even rocks