Stone Fruit Toxicity in Dogs (Cherries, Peaches, Apricots)
Stone fruits — cherries, peaches, apricots, plums, and nectarines — have fleshy fruit that is generally safe for dogs in small amounts, but the pit, seeds, stems, and leaves contain amygdalin, which releases hydrogen cyanide when metabolized. Chewed pits release cyanide; swallowed whole pits also present a choking and intestinal obstruction risk.
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⚡ Immediate Actions
- 1If the dog ate only the fruit flesh — monitor for GI upset, call vet if concerned
- 2If the dog chewed and swallowed pit(s) — call ASPCA Poison Control (888) 426-4435 or vet urgently
- 3If the dog swallowed a whole pit — call your vet; X-ray may be needed to check for obstruction
- 4Do not induce vomiting for pit ingestion without vet guidance
Symptoms & Timeline
Mild — fruit flesh or minor pit contact
Small exposures to fruit flesh or minimal pit contact produce only the non-specific GI response to any novel food item. The amygdalin content in trace amounts from the flesh or skin is hydrolyzed too slowly and in too little quantity to produce meaningful cyanide levels.
- Mild GI upset
- Vomiting
- Diarrhea
- Abdominal discomfort
Cyanide poisoning — chewed pit(s)
Crushing the pit exposes amygdalin to gut bacteria and stomach acid, which rapidly hydrolyze it into hydrogen cyanide. Cyanide binds cytochrome c oxidase in mitochondria, completely blocking cellular respiration. Oxygen cannot be utilized despite normal delivery, causing the cells to switch to anaerobic metabolism and rapidly exhaust their energy reserves. Bright red venous blood results from oxygen accumulating because cells cannot extract it.
- Rapid or labored breathing
- Dilated pupils
- Bright red gums (early cyanide sign)
- Weakness and collapse
- Seizures
Intestinal obstruction (swallowed whole pit)
A smooth, hard pit swallowed intact cannot be digested and may lodge at any point in the GI tract. The most common obstruction site is the pylorus or small intestine, where the pit's diameter exceeds the luminal diameter. Progressive obstruction causes accumulation of GI secretions proximal to the blockage.
- Vomiting
- Loss of appetite
- Abdominal pain
- Inability to defecate
- Bloating
ℹ️ Safe Amount Context
Small amounts of seedless, pit-free stone fruit flesh are generally considered safe. One or two pieces of fresh peach or apricot flesh without pit, stem, or leaves poses low risk for a medium to large dog.
How Stone Fruits — Cherries, Peaches, Apricots, Plums Affects Dogs
Stone fruit pits (and seeds, stems, leaves) contain amygdalin, a cyanogenic glycoside. When the pit is chewed and broken, intestinal bacteria and stomach acid hydrolyze amygdalin into hydrogen cyanide (HCN), benzaldehyde, and glucose. Cyanide inhibits cytochrome c oxidase in mitochondria, blocking cellular respiration — cells can no longer use oxygen despite normal blood oxygen levels. The result is cellular hypoxia, causing rapid neurological and cardiovascular collapse. The characteristic bright red gums result from venous blood retaining its oxygen (because it cannot be used by cells).
What Your Vet Will Do at the Clinic
For chewed pit ingestion with suspected cyanide exposure, the antidote combination of sodium nitrite and sodium thiosulfate is administered rapidly. Sodium nitrite oxidizes hemoglobin to methemoglobin, which has a higher affinity for cyanide than cytochrome c oxidase, drawing cyanide away from the mitochondria. Sodium thiosulfate then provides sulfur for the enzyme rhodanese to convert cyanide to thiocyanate, which is safely excreted in urine. Supplemental oxygen supports cellular respiration while the antidotes work. For whole pit ingestion without cyanide signs, radiographs locate the pit and endoscopic or surgical removal is planned based on location. Obstruction cases do not need cyanide antidote — they need mechanical removal.
Step-by-step protocol:
- 1Induce vomiting if pit was chewed and crushed within the last 2 hours (alert dog only)
- 2Supplemental oxygen therapy to combat cellular hypoxia from cyanide
- 3Sodium nitrite followed by sodium thiosulfate (specific antidote for cyanide toxicity)
- 4IV fluids and cardiovascular support for hypotension and shock
- 5X-ray if whole pit swallowed — endoscopic or surgical removal if obstruction risk
- 6Neurological monitoring and anti-seizure medication if tremors or collapse occur
Frequently Asked Questions
Can my dog eat cherries?
A few pitted cherries (with pit, stem, and leaves removed) are generally low risk for a medium or large dog. However, the risk is pit and stem exposure — when dogs eat cherries, they often chew on the pit. Maraschino cherries are safe from a cyanide standpoint but are high in sugar. Avoid giving dogs cherries regularly.
My dog swallowed a peach pit whole — is that a cyanide emergency?
A whole swallowed pit releases much less cyanide than a chewed one (the pit must be broken to release amygdalin). However, the pit itself is a serious choking and obstruction hazard. Call your vet — an X-ray may be needed to locate the pit and assess blockage risk.
Are dried fruits from stone fruits (dried apricots, prunes) safe?
The dried flesh of apricots and prunes (without pits) is generally non-toxic, though high in sugar and fiber — give only in very small amounts. Dried fruits often contain added sugar or preservatives. Never give raisins (dried grapes), which are in a completely different risk category.
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