Melt Butter In A Large Saucepan Over Medium Heat. Add Garlic And Onion And Saute For 5 Minutes. Add Goose Breast And Brown On Both Sides For About 5 Minutes, Or Until Browned. Place Goose Breast In Slow Cooker And Add Worcestershire Sauce. Add Chicken Broth To Cover (Approximately 2 Cups) And Cook On High Setting For 6 To 8 Hours, Or Until Meat Falls Off Bone. Shred With A Fork And Mix With Your Favorite Barbecue Sauce.