Dogs
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
dog safety reference
Is American Holly safe for dogs?
Ilex opaca
American Holly is an evergreen shrub or tree known for its spiny, glossy leaves and bright red berries. While ornamental, the plant contains compounds that can cause gastrointestinal distress if ingested by pets.
American HollyIlex opaca
- Light
- Full sun to partial shade
- Habit
- Tree or large shrub
- Care
- Low
Safety status
What this means for your dog
Dogs that chew American holly leaves or grab the bright red berries usually end up with mild stomach upset from saponins in the plant. Most cases are uncomfortable rather than life-threatening, but the spiny leaves can also scratch the mouth and throat on the way down.
What to watch for
The most common signs are vomiting and diarrhea, often paired with depression or low energy. Watch for drooling, pawing at the mouth (from the spiny leaves), reduced appetite, and abdominal discomfort. Berries are the part dogs are most likely to swallow.
Time window
Signs typically begin within a few hours of ingestion. Most dogs recover within 24–48 hours with supportive care; exact timing isn't tightly documented in ASPCA's listing.
When to call the vet
Call your vet if vomiting or diarrhea is repeated, if your dog stops drinking, or if you see blood, severe lethargy, or obvious mouth injury. Call ASPCA Animal Poison Control at (888) 426-4435 right away if a small dog ate berries or you don't know how much was eaten.
Sources: ASPCA (no first-aid guidance).
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Dogs — concern notes
Common signs
Vomiting, diarrhea, and depression.
Escalation note
Ingestion of the leaves or berries typically results in mild to moderate gastrointestinal upset. Please contact your veterinarian if your dog has ingested any part of this plant.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
American Holly is toxic to both cats and dogs, causing vomiting, diarrhea, and depression.
Same dog verdict
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