Slow Cooker Chicken and Dumplings

1 1/2 pounds skinless, boneless chicken breasts, cut into 1 inch pieces
2 medium Yukon Gold potatoes, cut into 1 inch pieces
2 cups whole baby carrots
2 stalks celery, sliced
2 (10.75 oz) cans condensed cream of chicken soup
1 cup water
1 tsp dried thyme leaves, crushed
1/4 tsp black pepper
2 cups baking mix
2/3 cup milk

1. Place the chicken, potatoes, carrots and celery into a 6 quart slow cooker
2. Stir the soup, water, thyme and black pepper in a small bowl. Pour the soup mixture over the chicken and vegetables.
3. Cover and cook on LOW for 7 to 8 hours or until the chicken is cooked through.
4. Stir the baking mix and milk in a medium bowl. Spoon the batter over the chicken mixture. Turn the heat to HIGH. Tilt the lid to vent and cook for 30 minutes or until the dumplings are cooked in the center