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Dangerous
Zinc in pennies is toxic to dogs.
Post-1982 US pennies are 97.5% zinc. If swallowed and stomach acid dissolves the coating, zinc poisoning occurs. Causes hemolytic anemia and organ failure.
Dangerous
Zinc in pennies is toxic to cats.
Zinc causes hemolytic anemia — destruction of red blood cells. Cats' smaller size means even one penny can cause serious toxicity.
If your dog has eaten this food and shows signs of distress (vomiting, diarrhea, lethargy, tremors, or seizures), contact your veterinarian immediately.