Possible Herbivore Coprolite

Identification of herbivore coprolites are tough. First of all, they are very rare. Secondly, vegetable matter is not always visible on the surface. Fortunately, this coprolite was fractured giving us a glimpse of what looks to be vegetable matter preserved in its interior. Could this be a dropping of a duckbill dinosaur? It was found among other possible coprolites in a 100' x 100' area near a nesting site where egg shells and the remains of baby Maiasaura were found.