They can be found in all lands and usually serve as food for the creature as well as the villagers (livestock).
Animal Farming Edit
Animals can raised for food. Grouping them in a herd close to water seems to make them grow and multiply, generating a larger herd. Feeding them with grain appears to speed up this process.
It is important to remember to keep them far away from villages, or the villagers will slaughter them faster than they can reproduce.