A seven-year-old miniature dachshund was presented with a large contaminated bite wound centred on the left costal arch. Survey radiographs revealed a pneumomediastinum, a mid-body fracture of the left 11th rib and luxation of the xiphisternum. The compromised skin, ribs, xiphisternum, diaphragm and abdominal wall were surgically debrided. This resulted in a large combined thoracic and abdominal wall defect. The thoracic cavity was closed by diaphragmatic advancement. The abdominal wall defect was partially closed by advancing local abdominal musculature. A cranial abdominal mid-line defect remained and was repaired using two sheets of lyophilised porcine small-intestinal submucosa. Dehiscence of the skin exposing the SIS graft was seen but the abdominal repair remained intact. Eighteen months after the initial injury, the dog remained clinically well and no associated complications were reported.

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