What predators did it have?
The Triceratops was one of the most non-hunted dinosaurs of it's era. It was prey to two groups of dinosaurs. The Tyrannosauridae (The Tyannosaurus Rex) and most species of Maniraptoran dinosaurs (Novaraptors, Velociraptors, etc...). It's main predator was the T-Rex. It would protect itself from it's predator's large jaw by moving it's frill down to protect it's bulky body, then attempting to peirce the T-Rex's torso with it's two, larger horns.
When dealing with raptors, depending on the size of the raptor, be it Dilophosaurus size or baby Velociraptor size, it was usually much harder for the Triceratops. The Maniraptorans would bite at it's legs until it stumbled to the ground in pain. The raptors would then bite and scratch at it's body until it passed out so they could eat it.
When dealing with raptors, depending on the size of the raptor, be it Dilophosaurus size or baby Velociraptor size, it was usually much harder for the Triceratops. The Maniraptorans would bite at it's legs until it stumbled to the ground in pain. The raptors would then bite and scratch at it's body until it passed out so they could eat it.