In the bowl of your slow cooker, toss in the little smokies, whole berry cranberry sauce, and chili sauce. Give everything a quick stir to coat the sausages evenly in the sauce.
Cook the sausages on low for 6 hours or, if you're in a bit of a rush, crank it up to high for 4 hours.
Once they’re done, these cocktail sausages are ready to serve straight from the slow cooker. Just set out some toothpicks!