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Are Hydrangeas Poisonous to Dogs?

Hydrangeas are beautiful shrubs with large, colorful flowers that many of us love to have in our gardens. However, it's important to know that these plants can pose a danger to our furry friends. All parts of the hydrangea plant, including the buds, flowers, leaves, and stems, can be toxic to dogs.

Key Takeaways

  • All parts of a hydrangea plant are toxic to dogs.

  • Do not leave your dog alone in an area where hydrangeas are located.

  • If your dog shows signs of toxicity, take them to an emergency vet clinic immediately.

What Is Hydrangea Poisoning in Dogs?

Hydrangeas contain a toxin called amygdalin, a cyanogenic glycoside. This compound is also found in almonds, apple seeds, and pits of fruits like cherries and peaches. When ingested, amygdalin is metabolized in a dog's body to produce cyanide, which reduces the body's ability to use oxygen, leading to potential toxicity.

Symptoms of Hydrangea Poisoning in Dogs

The symptoms of hydrangea poisoning can vary depending on the amount ingested. Signs can appear within 15 to 20 minutes after ingestion and may include:

  • Mild Poisoning:

  • Lethargy

  • Vomiting

  • Diarrhea

  • Depression

  • Loss of appetite

  • Abdominal pain

  • Severe Poisoning:

  • Increased heart rate

  • Fever

  • Excitement (whining, bouncy gait)

  • Rapid breathing

  • Drooling

  • Watery eyes

  • Urinary or fecal accidents

  • Muscle spasms

  • Bright red, then blue gums

What To Do if Your Dog Eats a Hydrangea

If you suspect your dog has ingested any part of a hydrangea plant, contact your veterinarian or the Pet Poison Helpline immediately. If your dog shows severe symptoms, seek emergency veterinary care without delay. Bring a sample of the plant to help the vet identify the toxin.

Diagnosing and Treating Hydrangea Poisoning in Dogs

The treatment will depend on the severity of the poisoning and the amount ingested:

  • Mild Cases:

  • Antinausea medications

  • Antibiotics for diarrhea

  • Probiotics to restore gut health

  • Hydration support

  • Severe Cases:

  • Induced vomiting (if ingestion occurred recently)

  • IV fluids and medications

  • Oxygen therapy if needed

  • Cooling measures for fever

  • ECG monitoring for heart irregularities

Prognosis of Hydrangea Poisoning in Dogs

The prognosis for dogs with hydrangea poisoning is generally good, especially if they receive prompt medical care. Dogs that recover from the initial symptoms usually have an excellent chance of a full recovery.

Preventing Hydrangea Poisoning

The best way to prevent hydrangea poisoning is to keep these plants out of your dog's reach. If you have hydrangeas in your garden or home, ensure your dog cannot access them.

For more information on keeping your dog safe and healthy, visit Always consult your veterinarian if you have any concerns about your pet's health and safety.




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