Q:

Do animal mobs tend to stick in a pack?

What is the behavior of animal mobs in a pack?
Do they tend to stick around the area, or do they migrate?
Do some members leave the pack? Or do all of them stick together?

A:

Currently there is no implementation of pack behavior, in either animals or monsters. However, wolves spawn in packs of 1 to 8 http://www.minecraftwiki.net/wiki/Wolf.

