CAN DOGS EAT BLUE CHEESE (ROQUEFORT)?
Blue-veined cheeses contain Roquefortine C, a mycotoxin produced by the Penicillium mold — even small amounts can cause severe tremors, seizures, and hyperthermia in dogs.
Can Dogs Eat Blue Cheese (Roquefort)?
Why?
Blue cheeses — Roquefort, Stilton, Gorgonzola, Bleu d'Auvergne, and similar varieties — are aged with Penicillium roqueforti mold. This mold produces Roquefortine C and PR toxin, both of which are tremorgenic mycotoxins that cause serious neurological symptoms in dogs.
Unlike plain cheeses, which are primarily a concern for fat content and lactose, blue cheeses carry genuine toxin risk. The tremorgenic syndrome includes muscle tremors, extreme agitation, hyperthermia, and seizures. Small amounts — a bite-sized piece of blue cheese — can trigger symptoms in sensitive dogs.
The mold visible in blue cheese is the active producer — the greenish-blue veins throughout the cheese are where Roquefortine C is most concentrated. Cheese rinds from aged blue varieties have the highest toxin load.
How much is dangerous?
No established threshold — even small amounts (one to two tablespoon-sized pieces) have triggered tremorgenic reactions in dogs.
What are the symptoms?
- muscle tremors
- agitation and panting
- hyperthermia
- vomiting
- diarrhea
- seizures
- incoordination
What should I do?
Contact your vet or ASPCA Poison Control (+1 888-426-4435) immediately. Treatment is supportive — cooling, IV fluids, muscle relaxants, and seizure management.
Frequently asked questions.
Is regular cheddar safe but blue cheese dangerous?
Yes — the risk is specific to the Penicillium mycotoxins in blue-veined cheeses. Plain cheddar, mozzarella, and similar cheeses don't carry this risk (though they're high in fat).
Can dogs have a crumb of blue cheese?
Even a small amount carries real risk. Given the lack of an established safe threshold and the severity of tremorgenic reactions, no amount of blue cheese should be given.
Disclaimer: This information is for educational purposes only and does not constitute veterinary advice. Every dog is different. Always consult your veterinarian before making changes to your dog's diet or in the event of a potential poisoning emergency.