Hydrangeas are valued for their vibrant flowers, yet they pose a danger to cats if ingested. Although toxicity levels vary among hydrangea types, all have the potential to harm cats. Here are measures to ensure your feline’s safety and well-being.

Why Are Hydrangeas Poisonous to Cats?

Hydrangeas contain cyanogenic glycosides, chemicals that can be toxic to cats and other animals, including humans. When the plant is chewed or eaten, these chemicals are released and can lead to symptoms like vomiting, diarrhea, and lethargy.

Cyanogenic glycosides are compounds that, when exposed to specific enzymes in the digestive system, can release cyanide. The toxicity level varies based on the hydrangea species and the quantity consumed. It’s critical to understand that even small amounts of cyanide can pose a significant risk to cats.

There are more than 75 varieties of hydrangeas, all of which contain toxins that can be harmful to cats if consumed in large amounts. Among these, the Bigleaf hydrangea (Hydrangea macrophylla) is particularly toxic to cats. It contains a substance that can induce vomiting, diarrhea, and lethargy in cats when ingested extensively. Additionally, the flowers of the Bigleaf hydrangea contain a higher concentration of this toxin compared to the leaves or stems.

Although certain hydrangea varieties may pose greater toxicity risks than others, any plant can be hazardous to cats if consumed excessively. If you suspect your cat has eaten any part of a hydrangea or another plant, it’s crucial to promptly seek veterinary care.

Symptoms of Hydrangea Toxicity in Cats:

Symptoms of hydrangea poisoning in cats can differ based on the amount consumed and the seriousness of the toxicity. Common signs may include:

• Vomiting
• Diarrhea
• Loss of appetite
• Lethargy, weakness, or depression
• Drooling
• Difficulty breathing
• Seizures
• Pale or blue gums
• Rapid heart rate

If you observe these symptoms or suspect your cat has consumed any part of a hydrangea plant, it is crucial to promptly seek veterinary assistance.

Steps to take if your cat consumes a hydrangea plant:

If you catch your cat chewing on a hydrangea plant, remove them from the area immediately to prevent more ingestion. Contact your veterinarian promptly to inform them of the incident. They may advise bringing your cat in for an examination or provide instructions on the next steps.

Monitor your cat closely for symptoms like vomiting, diarrhea, or lethargy. If you observe any unusual signs, seek veterinary assistance immediately. If feasible, bring a sample of the plant to the veterinarian’s office to aid in identifying the hydrangea species and determining the appropriate treatment.

Do not try to make your cat vomit unless specifically directed by your veterinarian, as it can be risky to attempt this at home. There is no antidote for hydrangea poisoning, but your veterinarian might suggest using activated charcoal to absorb toxins, along with other supportive treatments. It’s crucial to follow their guidance closely to maximize your cat’s chances of recovery.

Ways to prevent hydrangea poisoning in cats:

Although hydrangeas can enhance the beauty of your garden or indoor environment, their presence may pose a risk if you have cats. If you have hydrangea plants indoors or outdoors, ensure they are positioned in places that are inaccessible to your cat. This could mean placing them on elevated surfaces or securing them behind closed doors. Alternatively, opting for cat-safe plants throughout your home or garden can eliminate the risk altogether.

It’s important to recognize that hydrangeas aren’t the only plants that can be toxic to cats. Research other common houseplants and outdoor plants that may pose a danger to pets, and ensure they are kept out of reach. If your cat goes outside, closely supervise them and prevent access to any potentially toxic plants. Transitioning your cat to an indoor environment can also enhance their safety. Consider providing a catio or training your cat to use a leash and harness to safely enjoy outdoor activities.