The Barnyard (found original test pitch of Nickelodeon CGI animated series; 1999)
From The Lost Media Wiki
A still from the pilot.
Status: Partially Found
Back at the Barnyard was a TV series that aired on Nickelodeon from 2007-2010 and on Nicktoons in 2011. The show was a spin-off of the 2006 film titled Barnyard. Six years before the film's release, around the year 2000, a pilot for the series was created. This pilot was produced by DNA Productions for Steven Oedekerk's O Entertainment. The pilot was advertised with the tagline "What do animals do when humans aren't watching?". The pilot was never released, but footage can be found in an old teaser trailer from 2005. Screenshots from the pilot can also be found here.