This video is a deeper look into the story of Frankenstein. Think about the details that come up in the plot. What can you use in your story about a pig?
Notice that the "monster" is not a monster that's just out killing and destroying things. This makes the reader care about the monster. When you write your story, try to get your readers to care about your pig.
Isn't it amazing that this story was written by an 18 year-old girl?