Less Ice, Fewer Mammals, More Dinosaurs
"The Good Dinosaur" was basically like a rendition of "Ice Age" for anybody who might have balked at the high number of mammals in the older film. If you prefer cold blood in the veins of your protagonists, you should feel comfortable here. Just full of saurians.
In fairness, the mammals that do appear seem to have better hair on the whole than the ones from "Ice Age". That might be important. Hair's a key feature for mammals. It's right up there with endothermic metabolism and live progeny.
Best dinosaur of "The Good Dinosaur"?
Sam Elliott plays a cowboy tyrannosaur. I'm probably going to have to go with that.