Inspired by D&D's "Eberron" campaign where tribal halflings ride dinosaurs around.
The dinosaur mount is sort of a combination between a dromeosaur and an ornithomimus--predatory enough to aid a rider in the hunt, but not so vicious as to avoid domestication. I figure big dinonychus claws on his feet would enable him to take matters into his own hands, so I left them out. I don't remember if there is a specific dinosaur in the campaign like this or not.
"Eberron" is ©Wizards of the Coast