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Is Ragwort toxic to cats?

YES (TOXIC)
Unfortunately, Ragwort 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:Golden Ragwort, Tansy
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 Ragwort Toxic to Cats?

Cats are curious creatures that like to explore their environment and investigate anything they come across. Unfortunately, this can sometimes lead to them eating things they shouldn't. Some plants can be dangerous or toxic to cats if ingested, and ragwort is one such example.

The dangers of ragwort for cats

Ragwort (Senecio jacobaea) is a weed found in many parts of the world, including Europe and North America. Although it may look harmless, ragwort contains toxic substances known as pyrrolizidine alkaloids (PAs). These compounds can cause liver damage and other health problems in cats when ingested.

Even small amounts of ragwort can be harmful if a cat eats it regularly, and larger quantities can be lethal. The symptoms of toxicity may not appear right away, and can include:

  • Weight loss
  • Loss of appetite
  • Lethargy
  • Jaundice (yellowing of the skin and eyes)
  • Vomiting
  • Diarrhea
  • Abdominal pain
  • Difficulty breathing

If you suspect that your cat has eaten ragwort, it is important to contact your veterinarian immediately. Early diagnosis and treatment can improve the chances of survival.

How to prevent ragwort poisoning in cats

The best way to prevent your cat from being exposed to ragwort is to remove it from your environment. This can be difficult if you live in an area where the weed is common, but there are steps you can take to reduce the risk:

  • Identify and remove any ragwort plants in your yard or garden. Wear gloves and long sleeves to avoid touching the plant, as the toxic substances can be absorbed through the skin.
  • Avoid walking your cat in areas where ragwort may grow, such as pastures or meadows.
  • Keep a close eye on your cat when outdoors to prevent them from eating anything they shouldn't.
  • If you suspect that your cat has eaten ragwort, take them to the veterinarian immediately for evaluation and treatment.

Ragwort and other toxic plants for cats

While ragwort is one of the most toxic plants for cats, there are many others that can also be dangerous. Some of the most common include:

  • Lilies – can cause kidney failure
  • Sago palm – can cause liver failure
  • Tulips and daffodils – can cause gastrointestinal upset
  • Autumn crocus – can cause respiratory and gastrointestinal problems
  • Rhubarb – can cause kidney damage

If you have any plants in your home or yard that you suspect may be toxic, it is important to research them and remove them if necessary. You can also consult with your veterinarian or a horticulturist for guidance.

In conclusion

Ragwort is a toxic weed that can be dangerous or even lethal to cats if ingested. As a responsible pet owner, it is important to take steps to prevent your cat from coming into contact with this plant or any others that may be toxic. If you suspect that your cat has eaten something they shouldn't, seek veterinary care immediately to improve their chances of a full recovery.

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