Can dogs eat blue cheese?
If your dog has just eaten blue cheese
Do this now
- Stop your dog's access to any more of this immediately
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms
- Be ready to describe: your dog's weight, when they ate it, how much, and any other ingredients
- If your vet is closed, call the 24/7 Pet Poison Helpline on (855) 764-7661 or drive to the nearest emergency vet
What your vet will want to know
Have this information ready when you call:
- Your dog's current weight
- Approximately when the incident happened
- How much your dog ate (a rough estimate is fine)
- Any symptoms you've already noticed (vomiting, weakness, drooling, etc.)
- Any medications your dog is currently on
The full picture
Blue cheeses are made using Penicillium roqueforti mold, which produces a compound called roquefortine C. Dogs are unusually sensitive to this compound — far more than humans — and exposure can cause vomiting, diarrhea, high temperature, muscle tremors, and in worse cases seizures that can last for up to two days. Vets report increased cases around Christmas when blue cheese appears on cheese boards. All blue cheeses carry this risk: blue cheese, 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.
Only your vet should make this call. If you can't reach them, our 4-gate safety checker walks through when hydrogen peroxide is appropriate (and when it's dangerous — sharp objects, caustics, certain breeds, and more).
Check if vomiting is safe →Risks to watch for
- Vomiting and diarrhea
- Elevated body temperature
- Muscle tremors
- Seizures in severe cases
- Pancreatitis from the high fat content
- Effects can last up to 48 hours
Symptom timeline
Symptoms typically progress in stages. Knowing what to expect helps you act fast:
- 0–2 hours If roquefortine C present: tremors, panting, rapid heart rate, vomiting
- 2–6 hours Tremors intensify; severe cases: seizures, elevated body temperature
- 12–48 hours Secondary pancreatitis risk from high fat: vomiting, abdominal pain, not eating
Safe portion size
None. Skip blue cheese entirely.
Safer alternatives
- Small amount of plain cheddar
- Cottage cheese
Common questions
My dog just ate blue cheese — is it an emergency?
It depends on how much was eaten and your dog's size. Any amount of blue cheese warrants a call to your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — don't wait for symptoms. Small dogs reach toxic thresholds on smaller amounts than large dogs, but individual sensitivity varies too.
How long until symptoms appear after eating blue cheese?
Onset varies. Some toxicities (xylitol, caffeine) cause symptoms within 15–60 minutes. Others (onion, garlic, grapes) have delayed onset — symptoms may not appear for 24–72 hours, and clinical signs can still build days later. Always contact a vet immediately, even if your dog looks fine.
What's the treatment if my dog ate blue cheese?
Treatment depends on the substance and the timing. Options can include induced vomiting (only within the first hour or so and only under vet instruction), activated charcoal to limit absorption, IV fluids to support the kidneys or liver, blood tests to monitor organ function, and specific medications for symptoms like tremors or seizures. Never attempt home treatment without vet guidance.
Are there any safe alternatives to blue cheese?
See the alternatives section above. Most toxic human foods have perfectly good dog-safe alternatives — plain cooked meat, plain vegetables, or commercial dog treats designed for canine metabolism. There's no nutritional reason your dog needs human foods with known toxicity risks.
Unexpected vet bills can run into thousands
One emergency visit for food poisoning can cost $500–$10,000+. Compare US pet insurance in 60 seconds.
Learn about vet costs & insurance →Sources
The information on this page is compiled and cross-checked against these authoritative US veterinary and toxicology sources:
- ASPCA Animal Poison Control Center — 24/7 poison hotline and comprehensive toxic food database
- Pet Poison Helpline — veterinary toxicology service
- Merck Veterinary Manual — peer-reviewed clinical reference
- American Veterinary Medical Association (AVMA)
- American Kennel Club Expert Advice
- Cornell University College of Veterinary Medicine
Specific toxicity thresholds cited on this page come from the above sources; where they disagree, we cite the more conservative figure. Numbers are general guidance — individual dogs vary in sensitivity based on age, breed, medications, and health conditions. When in doubt, always call your vet.
Checked against US 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 ASPCA Animal Poison Control Center on (888) 426-4435.