Laddie was a collie owned by Bart.
Bart ordered him from a catalogue using a credit card he obtained through forgery. He was designed to be the ultimate dog, able to use a flushing toilet and perform multiple household chores. His charm quickly won the hearts of the whole family. When Bart's credit card went unpaid, the repo man came to take the dog away. Bart fibbed and mentioned that Santa's Little Helper was the dog he ordered. Santa's Little Helper was taken to the pound instead of Laddie. Eventually, Bart felt guilty because of that and then chose to give him away to the police force and try to recover Santa's Little Helper.
Laddie was later seen in the park when Marge was rushing home.
As a welcome gift he gives new owners fruit as he was trained to do it. He is also a guide dog who helps blind men. He also was watering the lawn when the repo men came to get him
He has white and tan fur, dark brown ears, and wears a purple collar. For special occasions, he wears an orange fur collar with a heart-shaped name tag.
- Reference to the character from the Lassie film "Son of Lassie."
| Homer Simpson • Marge Simpson • Bart Simpson • Lisa Simpson • Maggie Simpson •|
Santa's Little Helper • Snowball V
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|Abe Simpson • Abbie • Herbert Powell • Tyrone Simpson • Dr. Simpson • Cyrus Simpson • Chet Simpson • Stanley Simpson • Bill Simpson • Frank Simpson • Cyrus's 15 wives|
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|Homer's deceased relatives|
| Amber Simpson|
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|Marge's deceased relatives|
|Clancy Bouvier • Gladys Bouvier • Alvarine Bisque • Arthur Bouvier • Alfreda Bouvier II • Françoise Billout • Antoine Bouvier • Axel Bouvier • Bambi Bouvier • Charlene Bouvier • Chester Bouvier • Dorothé Bouvier • JoJo Bouvier • Monique Bouvier • Pépé Bouvier • Victor Bouvier • Victor Bouvier II • Cléo Bouvier • Didi Bouvier • Ferdinand Gurney • Gladys Gurney • Honoré Bouvier • Alfreda LeDoux • Angelique Marceau • Marcel Bouvier • Bambi Petitbois • Pierre Bouvier • Rowena Bouvier • Yves Bouvier|
|Hugo Simpson • Maggie Jr. • Bart Simpson, Jr. • Bart's Elder Son • Bart's Younger Son • Captain Kidney Pie • Colonel Custard • Maggie's Husband • Man O' Pies • Pieman of the World • Señor Fritatta • Zia Simpson|
|Bart Junior • Chirpy Boy and Bart Junior • Coltrane • Duncan • Greyhound Puppies • Henry the Canary • Laddie • Lou • Mojo • Pinchy • Plopper • Princess • Smiley • Snowball I • Snowball II • Snowball III • Snowball V • Snuffy • Stampy • Strangles • She's the Fastest|
|Chief Wiggum ● Lou ● Eddie|
|Bobo ● Officer Sniffy ● Laddie ● Scraps|
|Marge Simpson ● Gloria ● SpringShield: (Homer Simpson, Lenny Leonard, Carl Carlson) ● Santa's Little Helper|