Actually, more or less yes. Canines, felines and even whales hunt in packs. They organize themselves and each member has a function in the hunt. Early men did that also. They would plan an ambush and some will drive the prey there while others waited. Before the bow and arrow the used spears and were very good with them. Then, they discovered a much better way to through the spears with something called an atlatl. Eventually they domesticated some animals so they didn't have to go hunting as much.
No, it is not true, unlike dogs, which hunted in packs; early humans used stone tools and fire for hunting before the invention of bows and arrows. The stone tools were made from blade flakes and were efficient in cutting preys. When bigger preys were attacked them, they used fire to scare them away.