Is Hops Toxic to Cats and Dogs?
Hops are severely toxic to dogs — they trigger dangerous, rapid overheating (malignant hyperthermia). Brewing and spent hops are the risk. Call a vet immediately.
Potentially life-threatening — treat any exposure as an emergency.
Can cause real harm — call a vet for guidance.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Hops?
Hops are severely toxic to dogs — they trigger dangerous, rapid overheating (malignant hyperthermia). Brewing and spent hops are the risk. Call a vet immediately.
Also known as: brewing hops, beer hops, humulus lupulus, spent hops.
Symptoms to Watch For
🐕 In Dogs
- Dangerously high body temperature (malignant hyperthermia)
- Panting and rapid heart rate
- Restlessness and muscle tremors
- Seizures and death in serious cases
🐈 In Cats
- Possible elevated body temperature
- Panting and restlessness
- Tremors in larger amounts
What to Do If Ingested
- Call a veterinarian immediately — this can escalate fast.
- Note whether raw, pelletized, or spent hops were eaten.
- Begin cooling the dog with water and a fan while getting help.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Any hops were eaten (especially by a large breed)
- Panting, restlessness, or a hot body
- Tremors or seizures
Frequently Asked Questions
Frequently Asked Questions
Why are hops so dangerous to dogs?
Hops can trigger malignant hyperthermia in dogs — a rapid, uncontrolled rise in body temperature that damages organs and can be fatal within hours. Some breeds (like Greyhounds) appear more sensitive, but any dog can be affected.
Are spent hops from homebrewing dangerous?
Yes. Spent hops left in the trash or compost after homebrewing are a common cause of poisoning because dogs find them appealing. Dispose of hops where pets cannot reach them, and call a vet immediately if any are eaten.
What do I do while waiting for the vet?
Call the vet first, then start cooling your dog with cool (not ice-cold) water and a fan to bring the body temperature down safely. Get to a clinic immediately — this is a fast-moving emergency.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11