In terms of advantages, the plainest is that they make your farm more lively, and diversify your farming experience and income streams. Animals are productive all year round, giving players things to do during the winter months. Animals generate income not only with their growth and reproduction, but also with products like wool and milk, which can be sold or processed further for additional income. Cows and pigs produce slurry and manure, two types of cheap, organic fertiliser. Horses can be trained and ridden, allowing for increased map mobility. Additionally, bees can increase the yield of some crops if their hives are nearby.