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Zinc poisoning was identified in a 4-year-old dog secondary to ingestion and gastric retention of two pennies. The pennies were identified radiographically and were observed to dissolve almost completely over a 2-day period. The dog died 2 days after laparotomy and gastrotomy. Renal tubular necrosis and hepatic degeneration were identified histologically. Radiologists should be aware of the potential for intoxication from pennies and zinc nuts when these foreign objects are retained in the stomach.