HistoryAn 18-month-old 5.18-kg (11.4-lb) neutered male domestic shorthair cat kept predominantly indoors was evaluated because of lameness and unwillingness to jump of 5 days' duration. Extensive swelling of the right pelvic limb from the hip region to the digits was evident. A 6-cm-diameter abscess (containing 3 mL of purulent fluid) was present in the lateral and caudal thigh area, affecting the biceps femoris, semitendinosus, and semimembranosus muscles and overlying skin. A foreign body was not identified on surgical exploration of the abscess. The cat' s vaccination status was reportedly current, including vaccination against FeLV. Three days later, a second abscess (5 cm in diameter) was detected over the right dorsolateral portion of the sacrum. Surgi-