Most orphaned wild birds and aviary birds that stop eating because of illness can be saved when ER formula is given. ER stands for "EMERGENCY RESCUE". ER Formula is best administered using a crop needle, but it can also be given by spoon or syringe. It is ideal for orphaned nestlings who accept it voraciously by the syringe or spoon method. The crop needle application is a special technique that requires a crop needle and individual tuition.