This is what 'animal tracks and signs' (Bang / Dahlstrom) has to say
"Its prints are easily recognised by their very small size, usually under 3cm long, and there is a tendency for the inner cleave to be less developed than the the outer. Howver, in many animals the cleaves are symmetrical. The dew claws are small and normally leave imprints on very soft ground, and when the animal jumps."
I have just got thisexcellent book but isn't the 'to scale' munty slots the wrong size in the picture in the book? Cant remember the page number have a look and see if I have got it wrong again!!!