Pig: describes people as stupid, dirty and lazy. .

Dog: Cheap. Dogs look down on people and don't know whether it's good or bad. Some of them describe people as loyal as dogs.

Gratitude for using physical labor or mental thinking:

Bull: describes people who are loyal, hardworking and willing to work.

Horse; Little monk doesn't know the specific meaning, O(∩_∩)O~ doesn't mean ha.

But personally, I think I want to be ridden on my head. Describe a loyal servant.