Molly, a 6-year-old spayed bichon frise, was presented with a 2-month history of hematochezia and a 3-day history of inappetence and vomiting.


Hematochezia was initially mild but had progressed in severity. At presentation, Molly was defecating mostly frank blood with little discernible fecal material. Metronidazole (10 mg/kg PO twice a day), amoxicillin (10 mg/kg PO twice a day), and sulfasalazine (20 mg/kg PO 3 times a day) were previously prescribed for treatment of diarrhea but were discontinued 10 days before presentation after no apparent improvement. Heartworm and flea and tick preventives had also been discontinued.

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