Place 1 ball on a cutting board and cover it with a layer of plastic wrap. Using a rolling pin, press the meat into a thin rectangle, the thinner the better. Remove the plastic wrap and set a cheese stick in the centre of the meat, and then roll up the ground meat around it, folding in the edges to seal in the cheese. If you choose, wrap a slice of bacon around each hot dog, arranging it in a spiral pattern from one end to the other. (Depending on the size of your hot dogs, you may need more than 1 slice of bacon to wrap each one.) Roll, fill and wrap the remaining dogs, and then arrange them on a plate, cover and refrigerate for 1 hour.