The design for this tile is apparently taken from the engraving done by Samuel Howitt—in fact page 14 of my copy of his 1811 A New Work of Animals Principally Designed from the Fables of Aesop, Gay, and Phaedrus. Though the piglets may not be clear, the sow's udder is. The wolf's pose is a surprisingly good mix of non-chalance and eagerness.