The Adventures of Superpup

The Adventures of Superpup, a 1958 unaired pilot, was meant to capitalize on the success of "Adventures of Superman". Superpup featured the first television portrayal of the Superman characters as non-humans.
Overview.
Television producer Whitney Ellsworth created a pilot that placed the Superman mythos into a fictional universe populated by dogs instead of human beings. The live-action actors were placed in dog suits to portray the canine versions of the Superman characters. The pilot was filmed on the same set as "The Adventures of Superman", and little people portrayed the characters. Whitney Ellsworth later produced "The Adventures of Superboy" television pilot.
The Clark Kent character was renamed "Bark Bent". Bark Bent worked for the "Daily Bugle" under editor "Terry Bite". His co-worker was reporter "Pamela Poodle". Superpup/Bark Bent was played by actor Billy Curtis, who was also in "Superman and the Mole Men" with George Reeves.
In the pilot, Pamela Poodle is the victim of the evil Professor Sheepdip, who has tied her to a rocket that will be launched into space. Superpup must save her.
Other media.
A book titled "Superboy and Superpup: The Lost Videos", written by Chuck Harter, was published in 1993 by Cult Movies Press. Employees had seen the obscure pilots for both of the proposed replacements for the Reeves series, as well as twelve unproduced "Superboy" scripts. Both were released unofficially to the public domain on the VHS format. It is also available as part of Warner Home Video's fourteen-disc DVD set, "Superman Ultimate Collector's Edition". Half of the episode is presented in the collection in color from a surviving print, while the other half of the pilot is presented in black & white from a video master of lesser quality.