Just what kind of meat eater Lourinhanosaurus was is not clear to scientists. Some think it was a cousin of Allosaurus, while others think it may have been more closely related to the older Megalosaurus. The fossil bones found in Portugal belong to a teenaged dinosaur-not fully grown, but already nearly 14 feet (4.5 m) long. Part of the find was a number of gastroliths, or polished stones. Lourinhanosaurus would have swallowed stones to help grind up the food in it's gut. Some animals do this today-chickens, for example, aid their digestion by swallowing little bit's of grit.