Complex sentence: The rightful owner of Yeller shows up looking for his dog and recognizes that the family has become attached to Yeller, and trades the dog to Arliss for a home-cooked meal prepared by Travis's mother, who is an exceptional cook.
Split into simpler sentences: The rightful owner of Yeller shows up looking for his dog. The owner recognizes that the family has become attached to Yeller, and trades the dog to Arliss for a home-cooked meal prepared by Travis's mother, who is an exceptional cook.