Can dogs eat blue cheese?

No — contains roquefortine C

No. Blue cheeses (Stilton, Roquefort, Gorgonzola, Danish blue) contain roquefortine C from the mould used to make them, which can trigger seizures and vomiting in dogs.

The full picture

Blue cheeses are made using Penicillium roqueforti mould, which produces a compound called roquefortine C. Dogs are unusually sensitive to this compound — far more than humans — and exposure can cause vomiting, diarrhoea, high temperature, muscle tremors, and in worse cases seizures that can last for up to two days. Vets report increased cases around Christmas when Stilton appears on cheese boards. All blue cheeses carry this risk: Stilton, Roquefort, Gorgonzola, Danish blue, Cambozola. A small lick usually isn't an emergency, but larger amounts or smaller dogs warrant a vet call. Unlike most dairy issues (which are just lactose intolerance), this is a specific toxicity.

If your dog has eaten blue cheese

If your dog has had a significant amount, call your vet. Watch for tremors or shaking. Small amounts in a medium or large dog usually cause only stomach upset, but seek advice if symptoms appear.

Risks to watch for

  • Vomiting and diarrhoea
  • Elevated body temperature
  • Muscle tremors
  • Seizures in severe cases
  • Pancreatitis from the high fat content
  • Effects can last up to 48 hours

Safe portion size

None. Skip blue cheese entirely.

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Safer alternatives

  • Small amount of plain cheddar
  • Cottage cheese

Unexpected vet bills can run into thousands

One emergency visit for food poisoning can cost £500–£5,000+. Compare UK pet insurance in 60 seconds.

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Related foods

Cheese caution Milk caution Yoghurt caution
Written and reviewed by
The Can My Dog Eat editorial team

Every food page is cross-checked against UK veterinary sources including the Veterinary Poisons Information Service (VPIS), the Animal PoisonLine, PDSA, and the Merck Veterinary Manual before publication. We do not accept paid placements from brands. If you spot an inaccuracy, please let us know — we take errors seriously and correct them quickly.

Spot an error? Report it

Checked against UK veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the Animal PoisonLine on 01202 509000.

Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the Animal PoisonLine on 01202 509000 in the UK.