IMPACTION type colic is commonly seen when horses change from summer turnout to winter stabling. It is also seen when horses are on periods of box rest, either due to weather or for medical reasons. Impaction colic is specifically when dry matter gets blocked within the horse’s gastrointestinal tract (GI). The main area in which this blockage occurs is the pelvic flexure within the large colon. This is an area where the gut does a U turn making it much more susceptible to blockages.

Symptoms