Eleven horses with rectal prolapses were examined at Purdue University. Nine of the 11 prolapses were corrected by submucosal resection. Four of those were treated by a modified submucosal resection that apposes mucosa as well as submucosa. Follow-up of 8 cases, at intervals ranging from 4 months to 6 years, established that rectal prolapse did not recur following the resection.