Slime Bestiary Vol. II: Dairy slimes
Dairy slimes are commonly found around farms that produce milk. These slimes at one point were seen as a pest due to their tendency to leech off of a cow's milk. Later on, however, it was found that they turn this milk into "slime cream", which has become incredibly popular. Since then, farmers have started keeping dairy slimes around their farms in order to create their own slime cream.