Combine mayonnaise, egg (beaten), salt, poultry seasoning, and parsley flakes. Add baking powder. Remove crust from bread, dice into small cubes, and moisten with milk. Add to mixture. Carefully remove cartilage (shells) from crab meat and gently fold in. Form cakes into small balls. Refrigerate for at least 30 minutes. Deep fry at 350 degrees until golden brown. Serves 4 to 6.