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Queso is melted cheese plus everything that makes melted cheese interesting: onion, garlic, jalapenos, and salt. The cheese is the least of it. Onion and garlic are genuine dog toxins, and party bowls sit at exactly nose height.
Check Queso for your dog
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Why Queso needs caution
Most queso and nacho cheese recipes lean on onion and garlic, fresh or powdered, and the ASPCA lists both as toxic to dogs: they damage red blood cells and can cause anemia, with powdered forms more concentrated. The peppers add stomach-burning capsaicin, and the base adds a real fat and salt load. A dog that drank from the bowl took on all four at once.
The party-bowl scenario
A chip's worth of dip licked off the floor is a monitor-at-home event. A dog that emptied the crock pot is a different call: total up the volume, remember the chips that went with it, and treat the onion and garlic as the headline.
Signs to watch for
Vomiting, diarrhea, drooling; from onion/garlic (can lag by days): lethargy, weakness, pale gums, dark urine
What to do next
Estimate how much went down and whether the recipe had onion or garlic (most do). More than a taste, call your vet or poison control: the delayed red-blood-cell signs are the reason not to just watch.
•ASPCA APCC, people foods to avoid feeding your pets (onions and garlic, milk and dairy, salt)
Compiled from veterinary poison-control and medical reference sources, including the ASPCA Animal Poison Control Center, the Pet Poison Helpline, and the Merck Veterinary Manual. This is general educational information, not a diagnosis or a substitute for examination by your veterinarian. DogSafe's severity ratings are our own assessment, calculated from published guidance and your dog's weight. In an emergency, call ASPCA Animal Poison Control at 888-426-4435 or the Pet Poison Helpline at 855-764-7661.