I was sipping my morning joe at the excavation site when I noticed there appeared to have been some sort of serious altercation with the Donaldosaurus. I found evidence of a Scarboropteryx and Mikaceratops nearby. It looks like the sniping covered several days.
The Scarboropteryx was a sparrow-sized creature with a tree-dwelling lifestyle and had an unusually elongated middle finger. The Mikaceratops walked on two legs, had short front arms and a beak-like mouth that made a tweeting sound. Not sure what they were doing together, but they were no match when the Donaldosaurus came upon them.