Age, weight, and social effects on ulceration rate in rats.

Abstract

Three groups of Ss [subjects] were run in a conflict situation for 14 days individually, in pairs, or with 3 per box. Those Ss run individually ulcerated at a much greater rate than those run either in pairs or triplets. These results are consistent with some previously reported findings and inconsistent with others. The results are discussed in terms of differential availability of food and water during periods of presumed conflict.