Hydrangeas contain chemicals called cyanogen glycosides, which can be toxic to cats and other animals (including humans). When chewed or ingested, these chemicals are released and can cause symptoms such as vomiting, diarrhea, and lethargy.
Cyanogen glycosides are compounds that release cyanide when exposed to certain enzymes in the digestive system. While the toxicity levels vary depending on the specific hydrangea species and the amount ingested, it's important to note that any amount of cyanide can be dangerous for cats.
There are over 75 types of hydrangeas, and all contain toxins that can harm cats if ingested in large quantities. However, the most toxic hydrangea species for cats is the Bigleaf hydrangea (Hydrangea macrophylla). This plant contains a substance that can induce vomiting, diarrhea, and lethargy in cats if consumed in significant amounts. Additionally, the flowers of the Bigleaf hydrangea contain higher toxin concentrations than the leaves or stems.
While some hydrangea varieties may be more toxic than others, any type of plant can be hazardous to cats if ingested in large quantities. If you suspect your cat has ingested any part of a hydrangea or any other plant, seek veterinary care immediately.
Signs of Hydrangea Poisoning in Cats The signs of hydrangea poisoning in cats can vary depending on the amount ingested and the severity of the poisoning. Some common signs of poisoning include:
- Vomiting
- Diarrhea
- Loss of appetite
- Lethargy, weakness, or depression
- Excessive drooling
- Difficulty breathing
- Seizures
- Pale or bluish gums
- Rapid heartbeat
If you notice any of these symptoms or any other signs of illness or suspect that your cat has ingested any part of a hydrangea, seek veterinary care immediately.
What to Do If Your Cat Eats Hydrangea If you catch your cat chewing on a hydrangea plant, remove them from the area immediately to prevent further ingestion. Contact your veterinarian right away to inform them of what has happened. They may advise you to bring your cat in for an examination or may instruct you on the next steps.
Monitor your cat closely for any signs of illness, such as vomiting, diarrhea, or lethargy. If you notice any abnormal signs, seek veterinary care immediately. If possible, bring a sample of the plant to your veterinarian's office to help them identify the hydrangea species and determine the best course of treatment.
Avoid inducing vomiting unless instructed to do so by a veterinarian, as this can be dangerous if done at home. There is no antidote for hydrangea poisoning, but your veterinarian may recommend activated charcoal to help absorb any toxins along with other supportive care measures. Follow their instructions carefully to ensure the best possible outcome for your cat.
Preventing Hydrangea Poisoning in Cats While hydrangeas can add color and allure to your garden or indoor space, keeping them around can be hazardous if your cat also frequents the area. If you have hydrangeas planted indoors or outdoors, make sure they are placed in an area that is inaccessible to cats. This may involve placing them on high shelves or keeping them behind securely closed doors. Alternatively, consider using cat-safe plant alternatives.
It's not just freshly bloomed hydrangeas that can be toxic. Remember to research common indoor and outdoor plants that may be harmful to pets and keep them out of their reach. If your cat spends time outdoors, supervise them closely and keep them away from any plants that could be harmful. To protect your cat, consider transitioning them to an indoor environment. You can provide a safe outdoor experience by setting up a catio or training your cat to use a leash and harness for supervised outdoor excursions.
For a list of toxic and non-toxic plants, consult the ASPCA's Plant Database.
In case of emergency, ensure that you have the contact information for your veterinarian and an emergency veterinary hospital on hand.
Preventing Hydrangea Poisoning in Cats
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