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
Horses are especially susceptible to a variety of gastrointestinal incidents, manifesting themselves as episodes of colic or abdominal pain. The anatomy of the equine gastrointestinal system is long and has marked variations in its diameter which contributes to tl1e increased incidence of colic. Possible displacements and twisting may also be attributed to the sparse attachment of intestinal tract to the abdominal wall, which leaves areas of the gastrointestinal organs to move about freely.
Varner, K. L. and Reinertson, E. L.
"Colic: The Exam, Treatment, and Prognosis,"
Iowa State University Veterinarian: Vol. 54
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol54/iss1/7