Preheat oven to 350ºF and adjust rack to middle position. Cook pork over medium heat in a large skillet, using back of a wooden spoon to break the pork into small pieces. Using a slotted spoon, transfer the pork to a large bowl. Melt butter along with any leftover fat from the ground pork in the skillet. Add onion and celery and cook, stirring frequently until onions are just turning translucent, about 5 minutes. Stir in sage, parsley, salt and pepper. Pour mixture into the bowl with the pork. Add dried and cubed cornbread to onion and pork mixture. Whisk chicken stock and eggs in a medium bowl. Pour over cornbread mixture and gently toss until all ingredients are wet. Pour into an 11 x 7 – inch baking dish. Bake for 30-35 minutes until the top is golden brown. Serve.