Redundant mesocolonic mesentery in a Shire colt.

An unusual condition in a 3-month-old Shire colt presented for colic unresponsive to medical therapy is documented in this report. A redundant mesocolonic mesentery resulting in intestinal displacement and volvulus was diagnosed during exploratory celiotomy. The finding was presumed to be congenital, resulting in a loose anatomic configuration that predisposed the intestine to displacement, torsion, volvulus, and entrapment. Key clinical message: This case demonstrates that congenial anatomical anomalies should be included in the differential of younger animals presented for recurrent conditions and highlights the use of exploratory celiotomy to reach a definitive diagnosis.