A gestating cow will easily consume about 2.5% of her body weight on a D.M. basis of corn silage. If the cow weighs 1200 pounds, she could consume on a daily basis 30 pounds of silage on a D.M. basis. If the silage is 35% D.M., this 1200 pound cow could eat 86 lb (30 lb/.35 = 85.7 lb) of silage daily.