Kevin Michael Vail said in
rec.pets.dogs.behavior:

No, mulch is like bark or wood chips placed in a flower bed
for some botanical purpose (holds moisture in the soil or
some such).

I know from mulch, but I thought you might have being using a
polite-ism for doo-doo, since that's when dogs mostly do the
foot thing. I can see how mulch would make the demonstration
more satisfying, though, what with stuff to kick up.

--
--Matt. Rocky's a Dog.