The dinosaur in question was a plant eater, so was not trying to eat the mammal. "The victim of its attack was Psittacosaurus lujiatunensis, a bipedal, plant-e

The dinosaur in question was a plant eater, so was not trying to eat the mammal. "The victim of its attack was Psittacosaurus lujiatunensis, a bipedal, plant-eating beaked dinosaur" It doesnt fully exclude the "random attack" behaviour, but makes it more unlikely.