In the TV show Little House on the Prairie, Bandit is the dog that Laura and her family adopt during season 4. Laura initially does not want to keep Bandit as she was still missing her previous dog Jack. She was resentful of the new dog initially, but she eventually learned to love him.
Bandit, played by a dog named Jeffrey, appeared on the show through season 9, when he left with the Ingalls family as they moved to Burr Oak, Iowa.
Note: Bandit does not appear in the Little House books, he was added for the show only. However, Jack, their previous dog on the show did appear in the books as well.