Cut chicken into 1/2-inch strips. Place frozen vegetables in a 3-1/2- or 4-quart slow cooker. Top with chicken strips and turkey sausage. Add water, undrained tomatoes, and seasoning packet from rice, if present.
Cover and cook on low-heat setting for 5 to 6 hours or on high-heat setting for 2-1/2 to 3 hours. Stir in rice. If cooking on low-heat setting, turn to high-heat setting. Cover and cook 45 minutes more or until most of the liquid is absorbed and rice is tender. Makes 6 servings.