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Some Effects of Feeding Various Filled Milks to Dairy Calves. II. FecaL Characteristics and Digestibility Data¹

Department of Dairy Husbandry and Veterinary Pathology Section, University of Minnesota, St. Paul

ABSTRACT

Young dairy calves were fed low-fat rations or filled milks containing various fats. One group received a corn oil filled milk which was prepared daily rather than weekly, to study effects of storage. All other diets were prepared once each week. Differences in the color of feces were observed among the various rations. Abnormally large amounts of feces were voided by animals fed the com oil filled milk prepared weekly. Daily preparation of the corn oil filled milk diet or the feeding of hydrogenated corn oil greatly reduced the amounts of feces excreted.

Apparent dry matter digestibility for the weekly prepared corn oil filled milk group was significantly less than that obtained for any of the other diets. The apparent metabolic fecal fat excretion by calves fed a skimmilk diet containing 0.1% butterfat amounted to 5.36% of the fecal dry matter. It was established that the apparent digestion coefficients for butter oil were significantly greater than those for corn oil, hydrogenated corn oil, or lard. Daily preparation of the corn oil filled milk significantly increased dry matter digestibility, but did not significantly increase fat digestibility over the weekly preparation of this ration. Partition of the fecal fat revealed that a considerable portion was excreted as soaps by animals receiving the various diets. The fecal fat partition of calves fed butter oil filled milk was similar to that of apparent metabolic fecal fat, as excreted by animals in the skimmilk group.

¹ Scientific Journal Series Paper No. 4119, Minnesota Agricultural Experiment Station.

² Present address: Dairy Science Extension Section, The Pennsylvania State University, University Park, Pennsylvania.

³ Present address: Department of Agricultural Biochemistry, The Ohio State University, Columbus, Ohio.

⁴ Retired.