I have yet to meet a dog who doesn’t print his “R”s backwards. You’d expect this from a bulldog, whose burly paw you can’t even imagine grabbing a crayon (the preferred writing implement of canines) or a Chihuahua, whose paw would shake too hard to hold one, and especially a Borzoi/Russian Wolfhound (check out their alphabet), but a German Shepherd? One of the smartest breeds? Even these guys don’t get it right.
Cats, on the other hand — or paw, really — not only print the R correctly, but, when writing in script, illuminate all letters like a medieval monk.