Alphadon is a small mammal that resembles modern opossum. it was likely an omnivore, feeding on fruits, invertebrates and possibly small vertebrates. It hides in both burrows and trees. They are generally vivid, always on their guard to avoid being crushed by big dinosaurs but also to avoid being eaten to his by the theropods like the Hesperonychus and the troodon. Its omnivorous diet enabled him to survive the cold and starvation.