I've thought about this question myself. I like looking up why things or words are called what they are or how they came about -- especially when they don't make sense! So, here is my first research on the "wonder" item, and what I have found out about it.

Does pigs really save anything? Are they known for saving food when the winter time comes? Ants are often talked about in the Bible for analogies on diligence and hardwork, because ants gather and store food all the time, not wasting any day for laziness. And then, we know that dogs would bury their food, particularly bones. Camels store water in their humps so that they can travel many days in the dessert. Yup, those humps in the back of camels are their water storage containers. Squirrels, they gather nuts and store them away for the winter. But not pigs. They don't store anything. They don't save. They don't bury.