Pitz

Pitz, (Canis fugaraglobus) the dog in Creatures 2, was strongly believed to be a joke played on P.F.Magic, the creators of the "Petz" games which were a much simpler form of virtual life. The name Pitz would seem to be a dead giveaway, he does not need to eat, also he even makes some noises which are very similar to those of the P.F.Magic Dogz. The sprites for Pitz feature in the official Object Making Tutorials (Creatures 2).

Note: TrinityK has made a Christmas Pitz, it can be found here