These are the smaller of the fossilized poop specimens collected at the Triceratops excavation site shown in the 2nd photo. Because of the undigested bone fragments, it is fairly safe to conclude that the coprolites were produced by a carnivorous dinosaur, possibly a theropod, that may have fed on our Ceratopsian friend. The last microscopic photo shows what appears to be the interior core of a tooth. Carnivorous dinosaurs have been known to break their teeth while chomping through the bones of their prey. Sometimes the broken fragments are swallowed and show up in their poo.