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Is Milfoil toxic to cats?

YES (TOXIC)
Unfortunately, Milfoil 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:Yarrow
Scientific Name:Achillea millefolium
Family:Asteraceae
Toxic Principles:Glycoalkaloids (achillein), monoterpenes, sesquiterpene lactones
Clinical Signs:Vomiting, diarrhea, depression, anorexia, hypersalivation
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 Milfoil Toxic to Cats?

Cats are curious creatures that love to explore their surroundings. As responsible pet owners, it is crucial to be aware of any potential dangers that can harm our feline friends. Milfoil, also known as yarrow, is a common flowering plant found in many gardens and landscapes. Many pet owners wonder if milfoil is toxic to cats and if it can cause harm. This article will delve into the topic and answer some of the common questions about milfoil and its impact on cats.

What is Milfoil?

Milfoil is a perennial herbaceous plant that is commonly found in the Northern Hemisphere, including North America, Europe, and Asia. It is characterized by its feathery leaves and small clusters of white or yellow flowers. Milfoil is known for its various medicinal properties and has been used for centuries in traditional medicine for different conditions such as fever, digestive problems, and wounds.

Is Milfoil Toxic to Cats?

There is no clear evidence that suggests milfoil is toxic to cats. The plant is considered safe for animals in general, and there have been no reports of cats getting sick or poisoned from milfoil. However, as with any new addition to a cat's environment, it's important to be cautious and monitor their behavior carefully to ensure they are not ingesting the plant in large quantities.

What are the Risks of Milfoil for Cats?

Although not toxic, milfoil can pose some risks to cats if ingested in large amounts. The plant contains various essential oils that can cause gastrointestinal upset, including vomiting and diarrhea. Some cats may also experience allergy-like symptoms, such as skin irritation or itching if they come into contact with the plant. If you notice any unusual behavior or symptoms after introducing milfoil into your cat's environment, it's advised to seek veterinary care immediately.

Preventing Your Cat from Ingesting Milfoil

As with any plant, it's essential to take precautions to prevent your cat from ingesting milfoil. Here are some tips:

  • Keep milfoil plants out of reach of your cat, preferably behind closed doors or behind barriers.
  • Train your cat to avoid the plant using commands like “no” or “off.”
  • Trim away any overgrown milfoil plants to lessen the chances of accidental ingestion.
  • Supervise your cat when they are outside to prevent them from coming into contact with milfoil growing in gardens or parks.

Conclusion

While there is no clear evidence that milfoil is toxic to cats, it's essential to take precautions to limit their exposure to the plant. As with any new environmental addition, it's essential to monitor your cat carefully and seek veterinary care if any unusual symptoms arise. By being diligent and proactive, pet owners can help ensure their cats stay safe and healthy.

References:

  • Schulz, V., Hansel, R., & Tyler, V. E. (2006). Rational phytotherapy: a physician's guide to herbal medicine. Springer Science & Business Media.
  • American Society for the Prevention of Cruelty to Animals. (n.d.). Yarrow.
  • Poison Control. (n.d.). Yarrow.
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