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Is Euonymus Toxic to Cats?

☠️ ToxicSeverity: Moderate
✅ 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, euonymus is toxic to cats. The seeds, bark and foliage contain alkaloids and cardenolide-like compounds that irritate the gut and can affect the heart.

Also known as: Spindle Tree, Strawberry Bush · Euonymus europaeus

What makes it toxic

Alkaloids plus cardenolide-like glycosides concentrated in the seeds and bark. They inflame the digestive tract and in larger amounts disturb heart rhythm.

Warning signs to watch for

Drooling, vomiting, diarrhea and weakness within hours. Significant ingestions may add tremors and an irregular heartbeat.

What to do if your cat eats it

Remove plant material and offer water. Call your vet the same day; irregular heartbeat, collapse or persistent vomiting requires emergency care.

Common questions

Are euonymus berries the most dangerous part?

Yes, the seeds inside the orange capsules are the most concentrated source. Berry eating is the exposure vets see most often.

Do all euonymus varieties carry these toxins?

Yes — spindle tree, burning bush, wintercreeper and the rest of the genus share the same compounds, so treat them all as toxic.

More plants checked for cats

Pothos☠️ ToxicYes, pothos is toxic to cats. Chewing the leaves or vines releases sharp calcium oxalate crystalAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to cats. The gel is famously soothing for human skin, buSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to cats. They are one of the best houseplants for homes with curEaster Lily☠️ ToxicYes — and this is one of the most dangerous plants a cat can meet. Every part of an Easter lily,Sago Palm☠️ ToxicYes — sago palm is severely toxic to cats and among the deadliest houseplants. Every part contaiBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to cats — a classic choice for plant-loving cat households.

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.