 Dinheirosaurus is one of relatively few sauropods for which gastroliths were found obviously alongside the type specimen. In 2007, an experiment using Dinheirosaurus, Diplodocus (= Seismosaurus), and Cedarosaurus tested if sauropods used their gastroliths in an avian-style gastric mill. The analysis took into account that among the hundreds of sauropods found, gastroliths are only known from a few associated specimens. Authors chose to use the three sauropods with the most associated gastroliths, Dinheirosaurus, Diplodocus, and Cedarosaurus, because of the large amount of gastroliths found in birds. When birds were typically found to have 1.05 % of their body weight gastroliths, the sauropod Diplodocus, which had the highest amount of gastroliths, only amassed to 0.03 % body weight. This means that since the other sauropods Dinheirosaurus and Cedarosaurus had less gastroliths to body mass, an avian-style gastric mill is unlikely to have evolved in sauropods, and they instead might have used gastroliths to absorb minerals.
