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Use of Stabilized Tallow in Swine Rations¹

University of California²

Abstract

Three trials with 104 pigs have been run to test their response to rations containing 5 and 10% stabilized Tenderers tallow and 10% stabilized lard. In one trial oxytetracycline supplement was tested at a level of 20 gm. per ton of ration.

Tallow supplementation increased weight gain in all cases (10% tallow significant at the 1% level of significance and 5% tallow at the 5% level of significance). Feeding of 10% lard was without significant effect on weight gain. Backfat thickness was increased significantly on the high-fat rations but by no more than would be expected because of greater body weight.

Results of feed consumption were variable, but there were no consistent indications of lowered consumption on the high-fat rations. Feed utilization was poor on the tallow rations in trial 1 where tallow had no replacement value. Feed utilization was increased in trials 2 and 3 by tallow and lard feeding but by no more than the difference in calculated total digestible nutrient content due to increased fat content.

In one trial oxytetracycline supplement was without effect.

A taste panel test in one trial was unable to distinguish between tallow-fed pork and controls and failed to detect off-flavor in tallow-fed pork.

¹ This study was supported in part by a financial grant from the Pacific Coast Renderers Association and supplies of tallow from the Stockton Tallow Works Co., Peterson Tallow Co., Inc., and Peterson Manufacturing Co., Inc.

² Department of Animal Husbandry, Davis.