If you have something like a Diplodocus or something else that’s taller than a Rex before you start shooting it with your Trank arrows or darts In standup on top of it once you do that, then you can start shooting it It should come up to your dinosaur, but since your dinosaur so tall, it won’t be able to attack you and it won’t attack your dinosaur because your dinosaur isn’t related to any harm that was up to it. I tested at this method myself, but don’t blame me if it doesn’t work it’s either your dinosaur is too small or something went wrong.