Yes, chicken orzo can be made in the slow cooker. Place all of the ingredients except for the orzo, 2 tablespoons Parmesan cheese, and parsley in a slow cooker and cook on high for 3 hours. Add the orzo and cook an additional hour, then stir in the remaining Parmesan cheese and parsley before serving. For added flavor, sear the chicken before putting it in the slow cooker.