User blog comment:GravityFalls=Epic/New Season!!!/@comment-71.105.93.18-20130519161643

I think "The Land Before Swine" has either one of these three summaries

1. an episode about Waddles

2. An episode about ancient times (Gravity Falls in Caveman era)

3. What Mabel's life was like before Waddles came

Those are my thoughts - Dipperoolz