Hops: A Surprising and Serious Danger for Dogs

Hops, the flower used in beer brewing, cause a specific and severe reaction in dogs called malignant hyperthermia — an uncontrolled spike in body temperature that can become life-threatening within hours. This is most commonly seen in dogs who get into a home brewer's supply of hops (spent or fresh), and it's worth knowing about specifically because home brewing has become a fairly common hobby, and the danger of hops to dogs isn't widely known even among people who keep them in their house regularly.

Symptoms to watch for: panting, an elevated heart rate, restlessness, and a rapidly rising body temperature, progressing to vomiting, seizures, and in severe untreated cases, organ failure from the extreme temperature.

What to do right now: any known ingestion of hops, in any form (dried pellets, fresh flowers, or spent grain from brewing), should be treated as an emergency immediately given how quickly this can progress and how dangerous uncontrolled temperature spikes are.

When it's an emergency: always. If you brew beer at home and have a dog, this is worth knowing before it happens, not during.

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This is general information, not a substitute for an actual assessment of your specific pet, weight, and situation. If you're ever unsure whether something your pet ate needs immediate attention, a quick video vet consultation can tell you in minutes whether to monitor at home or head to a clinic.