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The following may be symptoms of fecal impaction: 1  Being unable to have a bowel movement. 2  Having to push harder to have a bowel movement of small amounts of hard, dry stool. 3  Having fewer than the usual number of bowel movements.  Having pain in the back or abdomen.
colonic impaction. intractable constipation occurs in dogs and cats, primarily with obstruction by foreign material and secondarily when there is an obstruction to the normal passage of feces, including retention because of pain at defecation. See also colon impaction colic of horses.