Is Elderberry toxic to cats?

Moderate severity

Yes. It can cause real illness — contact your vet if your pet has been exposed.

Symptoms to watch for

Vomiting
Diarrhea
Bloody diarrhea
Anorexia
Lethargy
Respiratory distress
Seizure
Death

How vets treat it

Veterinary treatment is required for large ingestions or if clinical signs are severe or persistent, such as multiple episodes of vomiting or bloody diarrhea.

Why it's dangerous

The plant contains cyanogenic glycosides which can cause gastrointestinal irritation and, in rare cases of high ingestion, lead to cyanide poisoning by interfering with cellular respiration.

Toxic compound: cyanogenic glycoside

Good to know

The risk of cyanide poisoning is very low for dogs and cats; gastrointestinal upset is the most common outcome.

Sources

Pet Poison Helpline

This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.

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