Threehorn: the idea is that a herd from far away lands escape the cold but when they arrive at the Great Valley they're met with not welcomed looks being a herd that care for themselves mostly and the rudiness they give to the welcome party just from the looks as they walk by. giving some real trouble to Little and friends when a group of kids from that herd that arrived treating him and the gang nothing more then nobodies.
Action9000: Indeed, there is safety in numbers. The idea of having a herd of different adult dinosaurs who are from the traditional mindset of herds being of a single type would be an interesting viewpoint. They are together for the sake of survival.Should there be the inclusion of a Littlefoot-like character, who is more interested in a strong community of all different kinds of dinoaurs (like the original LBT)? Perhaps this character is less accepted in the herd, and needs to make a stand with the dinosaurs in the Great Valley to convince the others that working together can be a great thing.
Me: The other variant makes it likely that the herd, while not being hostile towards any specific kind in particular, consists of very opportune members. It would probably provoke tensions within the herd as well and a kind of mood along the lines of: "everyone for oneself, don't care about the others".