Plum stones, stems, and leaves contain cyanogenic glycosides that release cyanide when chewed or digested, which can interfere with cells' ability to use oxygen and, in serious cases, lead to respiratory difficulty or seizures. The pit is also a choking hazard and can fracture teeth or cause an intestinal blockage.
Keep whole plums away from cats and remove the pit, stem, and leaves entirely. The flesh alone isn't reported as toxic, but it's high in sugar and best offered in only a very small amount, if at all.
The flesh alone isn't considered toxic, but it offers no real nutritional benefit to a cat and is high in sugar, so most veterinary sources recommend skipping plums rather than treating them as a safe snack.
Contact a veterinarian promptly. Pits can cause a blockage and contain compounds that release cyanide when crushed, so follow the instructions of your veterinarian or a poison hotline.
General public resources referenced while researching this tool's topic.
General educational guidance based on the references above, not veterinary advice. See our editorial policy for how we choose sources.
This tool is intended for educational purposes only and should not be used as a substitute for emergency veterinary advice, diagnosis, or treatment.
If your pet may have consumed toxic foods, chocolate, medications, chemicals, or other dangerous substances, seek immediate help from a licensed veterinarian or emergency animal service in your area. Do not delay professional care based on calculator or search results alone.
Pet poison hotlines (24/7, US and Canada):
ASPCA Animal Poison Control Center: (888) 426-4435
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Pet Poison Helpline: (855) 764-7661
Pet Poison Helpline states its service covers the U.S., Canada and the Caribbean. The ASPCA line is also used by Canadian pet owners. A consultation fee may apply to both. In Canada, your nearest 24-hour emergency vet clinic is the best first call; elsewhere, use local emergency veterinary directories.
How we calculate results: This tool uses commonly referenced veterinary toxicity thresholds and food safety guidelines. Actual toxicity can vary based on your pet's size, health status, and exact substance consumed. These results are estimates only and do not replace a veterinary assessment.