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Is Groundsel toxic to cats?

YES (TOXIC)
Unfortunately, Groundsel is toxic and potentially harmful to cats. We recommend you keep your feline friends away from this plant. See the table below for more information.
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Additional Names:Ragwort, Senecio
Scientific Name:Senecio species
Family:Compositae
Toxic Principles:Pyrrolizidine alkaloids
Clinical Signs:The plant is not very palatable, but will be eaten by animals with no other forage; poisonings typically occur from ingestion of green plant material or material in hay. The toxic components can cause liver failure, referred to as "walking disease" or "sleepy staggers". Signs include weight loss, weakness, sleepiness, yawning, incoordination, yellowish discoloration to mucous membranes (icterus), neurologic problems secondary to liver failure (aimless walking, chewing motions, head pressing). Animals may appear to be normal at first, then become suddenly affected; the syndrome progresses rapidly over a few days to a week. Liver damage, depression, anorexia, vomiting, diarrhea, muddy mucous membranes, weakness, ataxia.
If you think your cat may have ingested a poisonous substance, call 888 426 4435 or your local vet
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Groundsel Toxic to Cats

Cats are beloved pets for many households around the world, and as their owners, it is our responsibility to ensure their safety and well-being. Many plants and flowers have been known to cause harm to cats, and as a result, we must be careful with what we expose them to. One plant that is often in question is groundsel, which is a weed that can be commonly found in gardens, fields, and along roadsides. In this article, we will explore whether or not groundsel is toxic to cats.

What is Groundsel?

Groundsel is an annual or biennial plant that is native to Europe, Asia, and northern Africa. It is also commonly known as ragwort, tansy ragwort, stinking Willie, and benweed. The plant can grow up to 3 feet tall and has yellow flowers that bloom in summer. The plant is also known for its distinctive odor that smells like rotten cabbage.

Is Groundsel Toxic?

Groundsel contains a group of toxins called pyrrolizidine alkaloids (PAs), which can cause harm to the liver and other organs. These toxins are harmful to a wide range of animals, including cats, dogs, horses, and livestock. There have been reports of cats becoming ill after ingesting groundsel plants, which has led many to believe that groundsel is toxic to cats.

Symptoms of Groundsel Poisoning in Cats

If your cat has ingested groundsel, you may notice a range of symptoms, depending on the amount ingested and the cat's overall health. Some of the symptoms of groundsel poisoning in cats include:

  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Lethargy
  • Abdominal pain
  • Jaundice
  • Seizures
  • Coma

If you suspect that your cat has ingested groundsel, it is imperative that you take them to the veterinarian immediately. Your veterinarian can perform a physical examination and recommend a course of treatment based on your cat's symptoms and overall health.

Preventing Groundsel Poisoning in Cats

The best way to prevent groundsel poisoning in cats is to keep your cat away from the plant altogether. If you have groundsel growing in your garden or around your property, it is important that you remove it immediately. Make sure to wear gloves and protective clothing when handling the plant, as the toxins can be absorbed through the skin.

If you are unsure whether a plant is safe for your cat, it is best to err on the side of caution and keep your cat away from it. You can also consult with your veterinarian or a horticulturist to identify potentially toxic plants in and around your home.

Conclusion

Groundsel is a weed that can be commonly found in gardens, fields, and along roadsides. The plant contains pyrrolizidine alkaloids (PAs), which are toxic to cats and other animals. If you suspect that your cat has ingested groundsel, it is important to take them to the veterinarian immediately, as the toxins can cause serious harm to their liver and other organs. The best way to prevent groundsel poisoning in cats is to keep your cat away from the plant altogether and remove it from your property if it is present.

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