|Animal||Dog (season 5)|
Cat (season 10)
|Hair color||Brown (season 5)|
Grayish-white (season 10)
|Complexion||Brown (season 5)|
Tanned cream (season 10)
|Residence||Westboro Apartments, Elwood City|
|Cartoon debut||"Francine Goes to War"|
In "Feeling Flush," he replaces the toilet lid Francine and Catherine broke. When Francine checks the water-usage meter for her apartment, he becomes suspicious that her family is using more than their fair share of water.
He is named after Winnie the Pooh's house.
In his first appearance, Mr. Sanders was a dog depicted wearing a yellow shirt, blue overalls, and brown shoes, and carries tools around his waist.
However, he was completely redesigned in "Feeling Flush". In his appearance, he was a cat. He wore a turquoise vest and white undershirt with a blue tie. He also wore jeans and carried a set of keys, most likely to all of the rooms in the complex.