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Environmental Comparisons of Swine Performance as Affected by Shaded and Unshaded Wallows¹

University of California

Abstract

Results obtained over 3 years in which comparisons were made of pigs' response in a naturally hot environment (mean daily temperature 91° F.) modified only by the use of either a shaded or unshaded wallow (all animals had access to other shade) indicated consistent and significant increases in average daily gain and daily feed consumption for pigs provided with the shaded wallow. Rectal temperatures and respiration rates were higher for pigs with the unshaded wallow. Wallow water temperature during the hottest part of the day (10 a.m. to 5 p.m.) averaged 10° F. lower in the shaded wallow. Comparatively little use was made of the unshaded wallow after the water temperature reached 95° F.

¹ The 1957 test reported here was initiated under the direction of N. R. Ittner (deceased). The authors wish to acknowledge the inspiration he provided. The authors also acknowledge the assistance of Herdsmen, Phil Trask and Delbert Gaskin.

² Department of Animal Husbandry, El Centra.

³ Agricultural Engineer, U. S. Department of Agriculture, Davis.

⁴ Department of Agricultural Engineering, Davis.