I am afraid this probably got routed to the wrong individual.  It looks like Raccoon droppings to me, but I might would need more information to go on as well, such as other sign.  I'm afraid Wisconsin also has some species that it could possibly be that we do not have here in Texas, and I have no experience identifying their droppings.  Maybe we can get someone else to chime in as well.

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The Picture seems to show scat that is made up of Mulberry Seeds and could be from several species the most common and likely would be Raccoon.  Very similar appearance could be opossum, fishers, and fox.  Most carnivores and Omnivores will eat the mulberry, cherry and wild grapes when available and the scat will be comprised of these fruits.

Tim