Plums are unsafe for dogs due to the stone's cyanide compounds and choking/blockage risk. The flesh is mostly safe but very high in sugar. Never give your dog plums with the stone. Better alternatives exist.
Why Plums Need Caution
Cyanide in the Stone
Plum stones contain amygdalin, a compound that converts to cyanide when digested. Even one swallowed stone is concerning:
- Small dogs: One stone may be significantly toxic
- Large dogs: One stone may not be immediately harmful, but risk exists
- Multiple stones: Serious cyanide poisoning risk
Cyanide toxicity affects the nervous system and cardiovascular system.
Choking and Blockage Hazard
Plum stones are oval and roughly 2–3cm long—a perfect choking and blockage hazard:
- Direct choking: Stone lodges in throat (airway obstruction)
- Intestinal blockage: Whole stone swallowed causes GI obstruction (surgical emergency)
- Oesophageal perforation: Stone edges can puncture the food pipe
High Sugar Content
Fresh plums contain roughly 7g sugar per medium plum (11–12% sugar by weight). Regular consumption causes:
- Dental decay — Sugar feeds bacteria
- Obesity and diabetes — Excess calories, blood sugar spikes
- Diarrhoea — High fruit sugar causes loose stools
Additional Concerns
- Plum leaves and stems: Contain cyanogenic compounds; avoid entirely
- Skin: Can be irritating; peeling recommended
- Immature/underripe plums: More toxic compounds, harder stone
How Much Can Dogs Eat?
Small Dogs (under 10kg)
- Portion: 1–2 small slices, no skin, no stone
- Frequency: 1–2 times per week maximum
- Preparation: Peel, remove stone entirely, slice into tiny pieces
Medium Dogs (10–25kg)
- Portion: 2–3 small slices, no skin, no stone
- Frequency: 1–2 times per week maximum
- Preparation: Peel, remove stone, cut into bite-sized pieces
Large Dogs (25kg+)
- Portion: Up to 1/2 of a medium plum, no skin, no stone
- Frequency: 1–2 times per week maximum
- Preparation: Peel, remove stone entirely, cut appropriately
Plums are roughly 85% water and low in calories when served in small portions. They can be frozen as low-calorie summer treats. Always prioritise removing the stone.
How to Serve Safely
Step 1: Wash the plum thoroughly under running water to remove pesticide residue.
Step 2: Cut the plum in half and use a spoon to scoop out the entire stone. Do not leave any stone fragments.
Step 3: Peel the skin off (optional but recommended to reduce choking risk).
Step 4: Cut into appropriately sized pieces. Small dogs need grape-sized pieces.
Step 5: Offer as a treat or mix a small amount into their regular meal.
Storage: Refrigerate and serve within 1–2 days. Do not give spoiled or overripe plums.
When to Avoid
Do not give plums to dogs with:
- Diabetes or blood sugar sensitivity — High natural sugar
- Obesity — Excess calories from sugar
- Pancreatitis history — High fruit sugar can trigger recurrence
- Chronic diarrhoea — Fruit sugar worsens symptoms
- Kidney disease — High potassium content (secondary concern)
- History of intestinal blockage — Stone swallowing risk
Also avoid:
- Plums with the stone (primary hazard)
- Plum leaves and stems (cyanogenic compounds)
- Underripe or overripe plums (digestive upset)
- Prunes in large amounts (very high sugar)
- Plum juice or compote (concentrated sugar)
Symptoms to Watch For
If a stone was swallowed (immediate to 24 hours):
- Choking or gagging
- Difficulty swallowing
- Excessive drooling
- Abdominal pain and bloating
- Vomiting
- Straining to defecate or constipation
- Loss of appetite
Cyanide toxicity signs (1–4 hours after stone consumption):
- Tremors or muscle weakness
- Rapid heartbeat
- Lethargy or depression
- Difficulty breathing
- Convulsions or seizures
- Pale gums or mucous membranes
- Collapse
Sugar overload signs (within hours):
- Diarrhoea or loose stools
- Mild stomach discomfort
- Hyperactivity (temporary sugar spike)
If your dog shows any symptoms:
- Contact your vet immediately or call Animal PoisonLine on 01202 509000
- Provide: whether a stone was swallowed, your dog's weight, symptoms
- Your vet may recommend X-rays to confirm stone location and blood tests
Safer Alternatives
Instead of plums, offer your dog:
- Plain cooked chicken — Protein, no sugar
- Carrots — Low calorie, crunchy, safe
- Watermelon — Hydrating, no seeds (remove), very low sugar
- Blueberries — Low sugar, antioxidants, no choking hazard
- Apple slices — Low sugar, seeds removed, crunchy
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