I wish you good luck on making this game, although, I do recommend feathers on the raptors and on most of the dinosaurs/reptiles. Most of the dinosaurs (Tyrannosaurus, Stegosaurus, Triceratops, etc.) had feathers. Although, the larger ones like Allosaurus and Tyrannosaurus had very small feathers. Pteradons also had tiny, tiny feathers on them. I also prefer making the raptors small for realism due to velociraptors actually being the size of a small child. But I still wish you good luck!