To set the record straight, there is herding int he game. The AMA confirmed it with "Dinosaurs have a Social tab in their stats, which indicates how they prefer to live in their enclosures. A Ceratosaurus for example won't tolerate as many friends, whereas a Struthiomimus prefers a large herd. They also have a "socialise" action, which is when they will move together and communicate. It's up to you how you form your herds, and find out which species go well together." and as well they group of guys that played the game last week confirmed it as well.