With its low-crowned teeth, "Ferugliotherium" may have been an insectivore or omnivore, like similar multituberculates such as "Mesodma", which is thought to have eaten insects, other arthropods, seeds, and/or nuts. The wear on "Ferugliotherium" teeth suggests that the animal may have eaten some plant material. The high-crowned sudamericids are thought to have been herbivores feeding on abrasive vegetation, although their precise diet is not known. In the evolutionary history of gondwanatheres, hypsodont teeth are thought to have evolved from brachydont precursors. Gurovich hypothesizes that the anterior molariforms of sudamericids may have evolved from bladelike premolars as seen in "Ferugliotherium".