Is Holly safe for cats and dogs?
| Species | Verdict |
|---|---|
| Cats | Toxic |
| Dogs | Toxic |
Severity: Mild
Holly wreaths, garlands, and cut branches with their glossy leaves and red berries are a fixture of the US winter holiday season, sold at grocery stores, florists, and garden centers from Thanksgiving through New Year's. English holly (Ilex aquifolium) and American holly (Ilex opaca) also grow year-round as hedge and foundation shrubs across much of the eastern US and Pacific Northwest, so exposure is not limited to the holidays.
For cats, the likely exposure is batting at a hanging sprig or berry cluster in an indoor wreath or garland and knocking berries loose; for dogs, it is more often eating a berry or leaf that has fallen to the floor from a holiday arrangement, or chewing on an outdoor hedge branch within reach. The bright red berries are the part most likely to tempt a pet because they look like a treat.
ASPCA lists both American Holly (Ilex opaca) and English Holly (Ilex aquifolium) as toxic to dogs, cats, and horses, with saponins as the toxic principle; documented clinical signs are vomiting, diarrhea, and depression, and ASPCA together with NC State Extension both rate the leaves and berries as low-severity toxicity. Separately, Pet Poison Helpline flags a second, purely mechanical hazard that is easy to confuse with the saponin poisoning: the spiny leaf edges can physically injure the lips, gums, and mouth when chewed, causing drooling and head-shaking that has nothing to do with toxicity. If a pet shows ongoing vomiting, diarrhea, or looks unusually lethargic after eating holly, contact a veterinarian or ASPCA Animal Poison Control (888-426-4435).
Facts and examples
- ASPCA lists American Holly (Ilex opaca) as toxic to dogs, cats, and horses, with saponins as the toxic principle and vomiting, diarrhea, and depression as clinical signs. (source, verified 2026-07-28)
- ASPCA lists English Holly (Ilex aquifolium) as toxic to dogs, cats, and horses via the same mechanism (saponins), with the same low-toxicity clinical signs. (source, verified 2026-07-28)
- NC State Extension's Plant Toolbox entry for Ilex (holly) independently lists saponins as the toxic compound and rates the plant's poison severity as low. (source, verified 2026-07-28)
- Pet Poison Helpline notes holly's spiny leaves cause mechanical injury to the lips and gums (drooling, head-shaking) distinct from the saponin-driven GI upset. (source, verified 2026-07-28)
Verdict re-verified against aspca.org, 2026-07-28 — confirmed unchanged. Source
This page is for general information only and is not veterinary advice, diagnosis, or treatment. If your pet is showing symptoms, or you think they ate or touched something dangerous, contact your veterinarian or a pet poison-control hotline immediately.
Last verified 2026-07-28