Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
The small size of the Shetland pany presents problems in diagnosing and treating impaction of the cecum and colon. History and symptoms are similar ta those presented by larger breeds of horses but the difficulty in performing a rectal examination limits the accuracy of diagnosis and effectiveness of therapy. An exploratory laporotomy offers a method by which this disadvantage can be overcome.
Jones, Richard W.
"Correction of Impaction of the Small Colon in a Shetland Pony by Means of a Laparotomy,"
Iowa State University Veterinarian: Vol. 21
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol21/iss3/11