What Is Your Diagnosis? Severe Anemia in an Adult Alpaca

A 10-year-old male alpaca presented to the Texas A&M Veterinary Medical Teaching Hospital for evaluation of lethargy, hyporexia, and pallor of a one-week duration.Physical examination revealed pale mucous membranes, BCS of 1/5, FAMACHA score of 4/5, bilateral popliteal lymphadenomegaly, and caudal hindlimb edema.Initial stall-side testing revealed marked anemia (PCV 7%; total solids 4.4 g/dL; RI 22%-45%, 6.0-7.5).Serum biochemical analysis performed on the Vitros 4600 (Ortho Clinical Diagnostics Inc., Rochester, USA) identified hypoalbuminemia (2.1 g/dL; RI 2.9-4.3),mild hypocalcemia (7.7 mg/dL; RI 8.2-10.1),mildly increased BUN (47 mg/dL; RI 10-30), and hyponatremia (136 mg/ dL; RI 146-155).McMaster's fecal egg count demonstrated a high number of trichostrongyle-type eggs (2950/g).Despite treatments,