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A yearling female mallard duck (Anas platyrhynchos) presented to the Wildlife Center of Virginia (Waynesboro, VA, USA) after being rescued from an artificial pond at a city park in Stanton, VA, USA. The bird was observed being aggressively pursued and attacked by multiple male ducks. In addition to mallards, multiple species of domestic ducks and geese were present in the pond. On presentation, the duck had widespread abrasions over the dorsum, lacerations over the skull, and moderate bilateral periorbital swelling. The bird weighed 1.19 kg, was in poor to fair body condition (body condition score, 2/5), had decreased mentation, and was severely lethargic, mildly dehydrated, and unable to stand. Physical examination did not reveal any palpable instability of the long bones or the vertebral column; however, marked deviation of the vertebral column and asymmetry of the pelvic limbs was observed. Because of the bird’s debilitated state, further diagnostic tests were not performed. Initial treatment consisted of topical wound care for superficial lesions on the back, head, and neck with chlorhexidine gluconate 2% scrub and topical vitamin A/D ointment. Antimicrobial therapy with sulfamethoxazole trimethoprim oral suspension (100 mg/kg PO q12h) and subcutaneous fluid therapy with lactated Ringer’s solution (60 mL) with added vitamin B were administered. The bird was placed in a warmed incubator to provide supplemental heat and oxygen. Several hours later the bird was removed from the enclosure for further examination and to obtain radiographs (Figs 1 and 2). The bird died during the second examination. A cardiac venipuncture was performed immediately after death to obtain a blood sample for a complete blood cell count and serum biochemical analysis. Abnormal results were eosinophilia (490 cells/lL; reference interval, 140–240 cells/lL), increased serum protein (6.9 g/dL; reference interval, 3.5–5.5 g/dL), and high concentrations of AST (86 IU/L; reference interval, 12–73 IU/L), calcium (13.5 mg/dL; reference interval, 8.7–12.7 mg/dL), creatinine kinase (CK, 22 945 IU/L; reference interval, 165–378 IU/L), and uric acid (162 mg/dL; reference interval, 2–12 mg/dL).