D' Best Chicken N' Dumplings

INGREDIENTS

• 3 cups all-purpose flour
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 2 tablespoons shortening
• 1 cup ice water
•  
• 1 (4 pound) whole chicken, cut into 8 pieces
• 1 tablespoon seasoning salt, or to taste
• 3 1/2 quarts water
• 1/2 small onion, chopped
• 2 stalks celery, chopped
• 1/4 cup margarine
• salt and pepper to taste
• 1 teaspoon poultry seasoning