And then he tried to... eat them, apparently. The last thing Arnon remembers was passing out on his bed, hungry. And then waking up to being dragged to the Kitchens by Luna, and fed something meat-based that Celestia refused to describe the contents of. Apparently he'd been found in Luna's quarters, pinned to the wall, with both boasting Teeth-Marks on their flank. That, yes, matched his teeth. (They matched it to Tia's bite-marks, of course.) So, he felt bad. But... something about it was confusing him.