Why
Cherry pits, stems and leaves contain cyanogenic glycosides that turn into cyanide in the body. Swallowing one or two whole pits rarely causes poisoning, but chewed pits or larger amounts can, and pits can obstruct a small dog's intestines. The flesh itself is low-risk, but because pits are easy to miss, we take the safer route and list cherries as dangerous.
How to give it / if eaten
If your pet ate several pits or stems, or chewed pits, call your vet or an emergency clinic right away with the number and time. Don't induce vomiting at home without a vet's instruction.
Watch for these signs
Cyanide poisoning can cause difficulty breathing, panting, bright red gums, dilated pupils and collapse. An obstruction shows as repeated vomiting, poor appetite, constipation and belly pain.
FAQ
Is pitted cherry flesh okay?
A piece or two of fresh, fully pitted flesh is usually fine. Avoid candied or canned cherries, and there's no need to make them a regular treat.
My dog swallowed one cherry pit.
One whole swallowed pit is unlikely to poison your dog, but it can block a small dog's gut. Watch vomiting and stools for a few days and see your vet if anything changes.
General information only. Weight, age and health conditions change how a pet reacts, so ask your vet if you are worried.