A 22-year-old Warmblood gelding was referred to the North Carolina State University Large Animal Emergency Service for evaluation of anemia. The horse was treated for signs of colic and fever (38.9 °C)suspected to be secondary to a large colon impaction the day before the referral. Treatment consisted of administration of an unknown dose of flunixin meglumine and enteral fluids administered via nasogastric intubation.
Clinical and Gross Findings
On physical examination, the horse was quiet and alert, with mild tachycardia (52 beats/min), tachypnea (28 beats/min), and pale pink mucous membranes. Complete blood count showed marked macrocytic, normochromic, regenerative anemia with