The fourth season was made using a more low budget style of CGI.
Buddy is technically the only main character who is a dinosaur. His adoptive family, Tiny, Shiny, Don and their parents are Pteranodons, a type of flying reptile or pterosaur. Pterosaurs were not dinosaurs but the two groups were closely related and both evolved around the same time.
Tomy released a very popular series of toys for the show that where all interactive and would speak and sing with each other by using inferred motion sensors.
Developed by Jim Henson company
The pilot episode shows a very different overall tone to what the show has become. It was originally to contain numerous musical numbers throughout an episode, but now the musical numbers are no more.