− | Animals most commonly affected depend on the cause of the impaction. Significant risk factors include metabolic disease causing dehydration, inapproaprate diet, and drug therapy affecting gastrointestinal motility such as anticholinergics. | + | Animals most commonly affected depend on the cause of the impaction. Significant risk factors include metabolic disease causing dehydration, inapproaprate diet, and drug therapy affecting gastrointestinal motility such as [[Opioids|opioids]] and anticholinergics. |