Bo also responded to an identical question about herd behavior, confirming the dedication animation thing, but she also said that they will move together. This can be seemingly confirmed with at least the sauropods, which in recent game play they've shown to stick close to each other. It's hard to gauge herding though because the enclosures we've seen thus far are rather small.
That's not me justifying this though. I expect post-launch updates to update the herding behavior. Among a few other issues.
What do you mean Confirming the dedication animation thing?