What is the connotation of "piggy eyes" in the following excerpt from "How the Rhinoceros Got his Skin"? . . . he baked it till it was all done brown and smelt most sentimental. But just as he was going to eat it there came down to the beach from the Altogether Uninhabited Interior one Rhinoceros with a horn on his nose, two piggy eyes, and few manners.

It means that the Rhinoceros was fat.
It suggests that the Rhinoceros was greedy.
It describes how lazy the Rhinoceros was.
It shows how dirty and smelly the Rhinoceros was.