Protohadros had a massive, very deep set of lower jaws, and the snout was strongly turned down at the front, which according to Head suggested a habit of grazing on low-growing plants, rather than browsing from bushes or overhanging branches. Its diet would then have consisted of the swamp plants which grew in the delta streams in its habitat, scooped up by the broad, down-turned mouth.
Protohadros had a substantial, very deep set of lower jaws, and the snout was strongly angled downward at the front, which according to Head suggested a habit of grazing on low-growing vegetation, rather than browsing from bushes or overhanging branches. Its diet would then have consisted of the swamp plants that grew in the delta streams in its habitat, scooped up by the broad, down-turned mouth.