Tim, in one sense I agree: In the words of William Ralph Inge, "We have enslaved the rest of the animal creation, and have treated our distant cousins in fur and feathers so badly that beyond doubt, if they were able to formulate a religion, they would depict the Devil in human form."

But I'm not convinced there could literally be a Cow Satan - for the same reason that there are no branches of Everett's multiverse where any of the world's religions are true, i.e. because of their disguised logical contractions. Unless you're a fan of what philosophers call Meinong's jungle (cf. http://en.wikipedia.org/wiki/Meinong's_jungle), the existence of "Cow Satan" is impossible.