Yes exactly. An enclosure with 4 bodies of water at the four corners would be better for example than a single body of water in the middle as it gives dinosaurs more options to avoid dinosaurs they might not want to be near.What L.T. said might be the case. Herbies avoid carnivores in general, so when I have a mixed enclosure (and I don't do it often) I make sure it's big enough, has several bodies of water and feeders on the opposite sides, creating a natural separation.
Same if I have, for example a T-rex with a bunch of Dilophos or Raptors. You need to give your dinosaurs the option to NOT be close to one another, even if they share enclosure.
Do you have any carnivores in their enclosure? For some strange reason sauropods still panic at carnivores that have no way of harming them.
No carnivores turns out it was iguanadons fighting near them
Try making the enclosure a little larger, this should allow each species some more space to go about their business without concern for other dinosaurs within the paddock.