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Influence of Feed Preparation and Number of Pigs Per Pen on Performance and Occurrence of Esophagogastric Ulcers in Swine¹

Purdue University, Lafayette, Indiana

Abstract

Three experiments were conducted with growing pigs to study further those factors affecting rate and efficiency of gain and the incidence of esophagogastric ulcers and associated lesions. The factors studied were as follows: gelatinized vs. uncooked corn; fineness of grind of the diet; number of pigs per unit area of floor space and pelleted vs. meal diets. In general, physical form of the diet significantly affected rate of gain and the incidence of esophagogastric lesions of the pigs in these experiments. Castrate males gained significantly faster than females. Reducing the amount of outside pen space from 11.0 to 5.5 m.2 and the amount of house space from 1.1 to 0.55 m.2 per pig by doubling the number of pigs per pen resulted in a significant reduction in rate of gain and an increased frequency of esophagogastric lesions.

¹ Department of Animal Sciences Journal Paper No. 3494, Purdue University Agricultural Experiment Station. A portion of this research was supported by Grant No. AM-07730-01 of the National Institutes of Health, U. S. Dept. of Health Education, and Welfare.

² Deceased.

³ Present address: Fairbury, Illinois.

⁴ Department of Veterinary Science. Present address: University of Missouri.