Paleontologists can be wrong
Yahoo! News - Fossil Is Proof of Mammal Eating Dinosaur
Originally, scientists believed that mammals remained small because larger dinosaurs were hunting them. Only after dinosaurs went extinct by 65 million years ago did surviving mammals begin to grow larger, they reasoned.Now, the discovery of larger mammals is reversing some of the speculation. The Liaoning region already is famous for its trove of small feathered dinosaurs and early birds.
Science is theory. It is worthy of study, but It is not worthy of worship.