Additionally , the ITS reduced the incidence of CM in the non-lactating period in cows ( -1.0 % , p = 0.01 ) and in the 30 days following calving in heifers ( -2.0 % , p = 0.06 ) , and tended to reduce the estimated incidence of CM in cows post-calving ( -1.7 % , p = 0.10 ) .