Is Cotoneaster Toxic to Cats?
Also known as: Rockspray Cotoneaster, Hedge Cotoneaster · Cotoneaster spp.
What makes it toxic
Cyanogenic glycosides such as amygdalin in the berries, leaves and flowers. In the body they can release small amounts of cyanide, but typical pet nibbles cause mostly gut upset.
Warning signs to watch for
Drooling, vomiting and diarrhea within a few hours. Only large ingestions of leaves or many berries might bring lethargy, breathing changes or weakness.
What to do if your cat eats it
Remove berries from the mouth and offer water. Monitor for a day and call your vet if vomiting continues; emergency care is only needed for breathing trouble or collapse.
Common questions
Can a cat get cyanide poisoning from cotoneaster berries?
In theory the glycosides can release cyanide, but in practice a cat would need to eat a very large amount. Mild stomach upset is the realistic outcome.
Are the red berries more toxic than the leaves?
Both contain the glycosides, and berries are the part pets most often swallow. Neither is safe to eat in quantity.
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.