Baby Puss is the Flintstone's pet saber-toothed tiger. He is the one that Fred always tries failing to put out at night during the ending credit sequences.
The Flintstones was a Hanna-Barbera Production that originally aired on ABC-TV in prime time from 1960-1966. It was network television's first animated series to which there were 166 original episodes.
The original name of the series in which a pilot was even made, was The Flagstones. When it was realized that the "Hi and Lois" characters' surname was Flagston, the name was changed. The name Gladstones was considered and actually appeared on a number of sketches before the final change to Flintstones.
In the original closing sequence, Fred turns off the TV set, covers the bird cage, and attempts to put the cat out, which puts Fred out instead. These sequences were only used for the first two seasons and many people have never seen them, because the later, more familiar opening and closing themes were usually used for all episodes during syndication.
Pre-dating The Simpsons by almost 30 years, The Flintstones was the first primetime animated show on TV and, until 1997 when The Simpsons stole the crown, The Flintstones aired the most episodes of any animated show in primetime, with 166 episodes between 1990 and 1966.
The show was so successful, it established Hanna-Barbera as the largest producer of animated films. Here are 15 brontosaurus-sized facts about one of the greatest animated families of all time shared by Mentalfloss.com.