Jack Lilley, the stunt performer and actor who made a home for himself on Little House on the Prairie by working on every one of the beloved NBC drama’s nine seasons, has died. He was 91.

Lilley had Alzheimer’s disease and died Wednesday at the Motion Picture & Television Country House and Hospital in Woodland Hills, his granddaughter Savanah Lilley told The Signal, a news outlet in Santa Clarita.

In Blazing Saddles (1974), Lilley played one of the outlaws who loots the town of Rock Ridge, and in one scene, he and his horse slide into a pool of mud and are submerged. It was an accident, but director Mel Brooks liked it so much, he kept it in the movie.

The mustachioed Lilley had worked with Michael Landon on Bonanza for years starting in 1961, and that led to Landon hiring him for Little House in 1974. (Landon, of course, starred in,...