Twinning occurs in cattle about 1-4 % of the time , and research is underway to improve the odds of twinning , which can be more profitable for the breeder if complications can be sidestepped or managed . The incidence of twinning among cattle is about 1 â `` 4 % , and research is under way to improve the odds of twinning , which can be more profitable for the breeder if complications can be sidestepped or managed .