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Is Black-Eyed Susan Toxic to Cats?

☠️ ToxicSeverity: Mild
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, black-eyed Susan is mildly toxic to cats. Garden nibbles usually cause vomiting and diarrhea rather than serious illness.

Also known as: Rudbeckia, Coneflower look-alike, Gloriosa Daisy · Rudbeckia hirta

What makes it toxic

Irritant compounds in the leaves and stems, including mildly toxic sesquiterpene compounds, that inflame the gastrointestinal tract.

Warning signs to watch for

Vomiting, diarrhea, drooling and mild lethargy within several hours of eating leaves, stems or flowers.

What to do if your cat eats it

Remove plant material and offer water. Call your vet if GI signs persist more than a day or the cat stops eating and drinking.

Common questions

Is black-eyed Susan the same as coneflower?

No. Rudbeckia hirta is black-eyed Susan; echinacea is coneflower. They look similar and are related, but check the label — Rudbeckia is the one listed as mildly toxic.

My cat only sniffed and rolled in it — anything to worry about?

No. Contact with pollen or fur is harmless for this plant; only chewing or eating foliage tends to cause signs.

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.