Is Rattlebox Toxic to Cats?
Also known as: Showy Rattlebox, Rattlepod, Crotalaria spectabilis · Crotalaria spectabilis (and other Crotalaria spp.)
What makes it toxic
Pyrrolizidine alkaloids, which are converted in the liver into compounds that kill liver cells. The injury is cumulative — repeated small nibbles and one big meal both build toward liver failure.
Warning signs to watch for
Early signs are easy to miss: reduced appetite, lethargy and weight loss. Later come vomiting, jaundice, fluid-swollen abdomen, bleeding tendencies and neurological signs as liver failure develops over days to weeks.
What to do if your cat eats it
Call your vet after any confirmed ingestion, even with no symptoms, because the damage is delayed. Blood tests to check the liver, and removal of the plant, are the sensible immediate steps.
Common questions
Why is my cat fine days after eating it?
That is typical of pyrrolizidine alkaloids — the liver injury is delayed and cumulative, so a pet can look normal while damage accumulates. A vet check with liver values is warranted regardless.
Where does rattlebox grow?
It is a common weed of fields, roadsides and disturbed soil, named for the rattling seed pods. Outdoor cats in rural and suburban areas encounter it regularly.
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.