Is American Holly Toxic to Cats?
Also known as: Christmas Holly, Common Holly · Ilex opaca
What makes it toxic
Saponins and related ilicin compounds in the leaves and berries, which inflame the digestive tract. The stiff, pointed leaves also physically injure the mouth.
Warning signs to watch for
Drooling, lip smacking, vomiting and diarrhea within a few hours. Spine scratches inside the mouth can cause pawing at the face and refusal to eat.
What to do if your cat eats it
Remove any leaves or berries from the mouth and offer water. Call your vet if vomiting persists beyond a few hours, blood appears in stool, or your cat stops eating.
Common questions
Are holly berries poisonous to cats?
Yes. Berries contain the same saponins as the leaves and commonly cause vomiting and diarrhea, though a single berry is rarely life-threatening.
Is holly dangerous during the holidays as decor?
It is one of the classic seasonal risks. Keep wreaths, garlands and arrangements with real holly well out of reach, or use artificial holly instead.
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.