Is Sweet Woodruff Toxic to Cats?
Also known as: Hay Plant, Master of the Woods, Galium odoratum · Galium odoratum
What makes it toxic
Coumarin, the compound behind the new-mown-hay scent. Fresh leaves are mildly irritating; when the plant wilts, coumarin converts to dicoumarol, an anticoagulant, so wilted material is the more dangerous form.
Warning signs to watch for
Vomiting, diarrhea and mild lethargy after eating fresh leaves. Heavy or repeated intake of wilted plant could add bruising or bleeding tendencies over time.
What to do if your cat eats it
Remove plant material, offer water and monitor after a small nibble. Call your vet if vomiting persists, and seek care promptly if you notice bruising, pale gums or unusual bleeding.
Common questions
Why is wilted sweet woodruff worse than fresh?
Wilting lets coumarin convert to dicoumarol, the same blood thinner found in spoiled sweet clover — never let pets reach wilted clippings.
It is used in human drinks — is that a problem for cats?
Yes. May wine and herbal preparations are for adults with tolerance; the doses that flavor a drink are not meant for a cat’s small body.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.