1.In A Slow Cooker, Mix Chicken, Celery, Green Bell Pepper, Onion, Garlic, Tomatoes With Liquid, Sugar, Salt, Italian Seasoning, Cayenne Pepper, And Bay Leaf. Cover, And Cook On Low 7 To 9 Hours. 2.Remove Bay Leaf From The Chicken Mixture, And Stir In Orzo. Increase Heat To High. Cook 15 Minutes, Until Orzo Is Tender. 3.Stir In Shrimp, And Cook 2 Minutes, Until Shrimp Are Heated Through.