The prehistoric animal CGI models featured in the show were actually bought from the 3D model sharing website Turbosquid, rather than created for the program. These are non-scientific models made by general 3D artists who are not affiliated with the Discovery Channel and are not knowledgeable on animal anatomy. This also explains why the models are not in any way accurate to scientific thinking, since they were not created with educational intent. Viewers of the series who have tried downloading these models also found out that they contain a dangerous computer virus.
This was the Discovery Channel's first Dinosaur related show in almost 10 years.