Case report links zinc foreign body ingestion to methemoglobinemia

A new case report in the Journal of Veterinary Emergency and Critical Care describes what the authors say is the first documented dog with methemoglobinemia occurring alongside zinc toxicosis after ingestion of a zinc-containing foreign body. The dog presented with zinc toxicosis, mild methemoglobinemia, multi-organ dysfunction, and ultimately cardiopulmonary arrest, expanding the clinical picture veterinarians may need to consider when working up suspected metallic foreign body cases. The report was published in early April 2026 by Kate Tasker, Alicia Mastrocco, Jennifer Prittie, and Mariel S. Covo. (pubmed.ncbi.nlm.nih.gov)

Why it matters: Zinc foreign body ingestion in dogs is already known to cause GI irritation, intravascular hemolysis, and liver, kidney, or pancreatic injury, with pennies minted since 1982 among the best-known sources. This case suggests methemoglobinemia may be an underrecognized concurrent complication, which could matter when a dog with suspected zinc exposure has cyanosis, chocolate-brown blood, hypoxemia that seems disproportionate to pulmonary findings, or rapid deterioration. For veterinary teams, that raises the value of early imaging, CBC and chemistry testing, and prompt source removal with aggressive supportive care. (merckvetmanual.com)

What to watch: Watch for whether future case reports or retrospective studies confirm how often methemoglobinemia accompanies canine zinc toxicosis, and whether that changes emergency diagnostic protocols. (pubmed.ncbi.nlm.nih.gov)