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Is American Holly Toxic to Dogs?

☠️ 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, American holly is toxic to dogs. Both the spiny leaves and the bright red berries contain saponins that upset the digestive system.

Also known as: Christmas Holly, Common Holly · Ilex opaca

What makes it toxic

Saponins in the leaves and berries irritate the stomach and intestinal lining; the rigid leaf spines can scratch the mouth, tongue and throat.

Warning signs to watch for

Drooling, vomiting, diarrhea, lip licking and abdominal discomfort within a few hours. Blood-tinged vomit or stool can occur with larger ingestions.

What to do if your dog eats it

Remove plant material and offer fresh water. Contact your vet if vomiting continues, if blood appears in vomit or stool, or if the dog seems in pain.

Common questions

How many holly berries will hurt a dog?

A few berries usually cause only vomiting and diarrhea. A larger handful, especially in a small dog, can cause more serious GI inflammation and dehydration.

Is English holly also toxic to dogs?

Yes. English, American, Japanese and most other Ilex species contain the same irritating saponins, so treat all hollies alike.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals thaAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain coSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk ofEaster Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal kiSago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untreBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

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.