Why?
Blue cheese contains roquefortine C, a substance produced by the Penicillium fungus used to create the cheese. Dogs are very sensitive to this compound.
How much can dogs have?
NONE. This is one dairy product dogs should never have.
What to watch out for
Symptoms include vomiting, diarrhea, tremors, and seizures. Other moldy foods carry similar risks — never let dogs eat moldy leftovers.
🚨 If your dog ate blue cheese: Contact your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right away. Don't wait for symptoms — many toxins act internally before signs appear.