I neglected to mention it, but as is usual at the create a strip panel, audience suggestions are taken into account. Gabriel will draw anything that is requested, and often solicits feedback about particular poses or gestures. So it was on Saturday, when a young man flush with ponylove did request that such a beast be appended to the strip in the final panel. Maybe it's his patronus or something; I didn't ask. Brenna suggested that the pony was skulking around down there, as what she called a "sinister accomplice of evil," but I'm not certain that a pony can skulk. I mean, physically.
I don't believe that ponies are natural skulkers.