In a large bowl, combine the chopped celery and onion in butter until transparent, approximately 5-10 minutes. Pour sauteed mixture over cornbread mixture. Add the stock, mix well, taste, and add salt, pepper to taste, sage, and poultry seasoning and mix well. Add beaten eggs and mix well. Reserve 2 heaping tablespoons of this mixture for the giblet gravy. Pour mixture into a greased pan and bake until dressing is done, about 45 minutes. Serve with turkey as a side dish.