In my mind's eye, I picture a sleeping fennec to look almost exactly like the animal in this photo. We should be trying to disprove that this is a Fennec, rather than disproving that it's a Ruppell's fox. I guess I've been hesitant because I've never seen a live Arabian Ruppell's in daylight before (despite having seen the species in the wild on numerous occasions.) The zootierliste listing might also have had some influence.
Thanks. Sorry for being difficult, and well done ThylacineAlive for bringing up the point in the first place.