Olives are not recommended for dogs. Most olives are high in salt (brined). Olives with pits are a choking and blockage hazard. Even pitted olives should only be offered very occasionally in tiny amounts, if at all.
Olives are a Mediterranean staple appearing increasingly in UK households, whether as a snack, aperitif, or ingredient in salads and dishes. Dogs might encounter olives if dropped or offered by well-meaning owners. Understanding the risks helps prevent health consequences.
Why Olives Need Caution
Olives present several concerns:
Extreme salt concentration (the primary concern): Most olives are preserved in brine (salt solution), making them extremely high in sodium. A single olive in brine contains 100-200mg of sodium — roughly 10-20% of a small dog's entire daily recommended sodium intake. A small handful of olives (5-10) exceeds daily recommendations.
Excessive salt causes:
- Excessive thirst and urination
- Dehydration and electrolyte imbalances
- Increased blood pressure
- Exacerbation of existing kidney or heart disease
- Potential salt toxicity with large amounts
Olive pits (choking and blockage risk): Olives with pits are dangerous:
- Pits are hard and indigestible
- Can lodge in oesophagus, causing choking
- Can lodge in stomach or intestines, causing blockage
- Blockages require emergency surgical removal
- Puppies and enthusiastic eaters are at highest risk
High fat content: Whilst olives aren't extremely fatty, they contain 10-15% fat, contributing unnecessary calories and potential pancreatitis risk in sensitive dogs.
Difficult to digest: The olive flesh is fibrous and can cause gastrointestinal upset in dogs unaccustomed to high-fibre foods.
Potential additives: Some olives contain garlic, chillies, or other seasonings unsuitable for dogs. Always check the ingredient list.
Olive pit ingestion is a real emergency risk. Blockages cause severe vomiting, abdominal pain, and potentially death if not surgically treated. Never assume a dog will "pass" a swallowed olive pit — hard objects rarely pass through the digestive tract. If your dog consumes an olive with the pit, contact your vet immediately for monitoring and imaging if symptoms develop.
How Much Can Dogs Eat?
Plain pitted olives, unsalted or low-sodium:
- Small dogs (under 10kg): Maximum 1-2 olives, very occasionally (once monthly or less)
- Medium dogs (10-25kg): Maximum 2-3 olives, very occasionally (once monthly or less)
- Large dogs (over 25kg): Maximum 3-5 olives, very occasionally (once monthly or less)
Olives in brine (standard salted olives): Not recommended; salt content is excessive.
Olives with pits: ZERO — absolutely avoid due to choking and blockage risk.
How to Serve Safely
If offering olives to your dog:
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Remove the pit completely. Inspect to ensure no pit fragments remain.
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Rinse well. Even if low-sodium, rinsing under cool water reduces sodium further.
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Chop into small pieces to prevent choking.
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Offer very occasionally. Once monthly or less; olives offer minimal nutritional value.
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Monitor after consumption. Watch for signs of blockage (vomiting, abdominal pain, inability to defecate) over the following 24-48 hours.
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Store securely. Keep olives in locked cupboards where dogs cannot access them.
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As an alternative: Plain cooked vegetables (green beans, courgette, carrots) provide similar enjoyment without salt or choking risks.
When to Avoid
Avoid olives for dogs with:
- Olives containing pits (choking/blockage risk)
- High blood pressure or heart disease (salt is contraindicated)
- Kidney disease (excessive sodium is contraindicated)
- History of pancreatitis (fat content, though modest)
- Sensitive stomachs or history of blockages
- Any olives containing garlic or chillies
Symptoms to Watch For
Acute symptoms from salt overconsumption:
- Excessive thirst
- Excessive urination
- Vomiting
- Diarrhoea
- Lethargy
Blockage symptoms (if pit was ingested):
- Vomiting or retching
- Abdominal pain or distension
- Loss of appetite
- Constipation or inability to defecate
- Lethargy and depression
- Dehydration
Signs of choking (if pit lodged in oesophagus):
- Drooling or inability to swallow
- Gagging or coughing
- Reluctance to eat or drink
- Respiratory distress (if oesophagus severely compressed)
What To Do If Your Dog Eats Olives
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Assess the situation. Were the olives pitted? If not, contact your vet immediately — pit ingestion requires monitoring.
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If olives with pit were consumed: Contact your vet immediately. Provide:
- Number of olives consumed
- Dog's weight
- Time of ingestion
- Breed (puppies and small dogs are at higher risk)
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For pitted olives in brine: Monitor at home for excessive thirst and urination over 2-4 hours. Ensure fresh water is available.
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If symptoms develop:
- Vomiting, abdominal pain, or inability to defecate: Contact your vet — blockage evaluation may be needed
- Excessive thirst/urination: Encourage water intake; monitor. Contact vet if symptoms persist
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For blockage concerns: Your vet may:
- Perform abdominal palpation
- Recommend X-rays to visualise pit location
- Monitor for symptom development
- In some cases, recommend ultrasound or CT
- Perform surgery if blockage is confirmed or cannot be ruled out
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Contact Animal PoisonLine (01202 509000) if unsure whether symptoms warrant veterinary attention.
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