Suspect poisoning? US: ASPCA Poison Control (888) 426-4435 · UK: 01202 509 000 · Severe symptoms → nearest emergency vet now.

My 2 kg Yorkshire Terrier ate a yew berry from a Christmas decoration — is a single berry lethal at this size?

Dogs · Emergency guide

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

A single yew berry can be lethal in a 2 kg dog. Taxine alkaloids in yew act on the heart within minutes, and at that body weight even one berry delivers a dose large enough to cause sudden cardiac arrest. The danger does not scale down gently — a 20 kg dog might survive one berry, but a 2 kg dog is in a completely different risk bracket. Watch for vomiting, wobbliness, or pale gums, but do not wait for signs to appear before acting. Call your vet or the ASPCA poison hotline at 888-426-4435 now. Keep the broken decoration away from him and bag the remaining berries for disposal.

Why Yew Is Dangerous

Yew plants contain taxine alkaloids that affect the heart and nervous system

Even small amounts can cause vomiting, weakness and sudden cardiac arrest

Why speed matters

Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.

Signs to watch for

  • Vomiting and drooling
  • Weakness or collapse
  • Irregular heartbeat or sudden cardiac arrest
  • Pale gums
  • Seizures

What to do right now

  1. Call your veterinarian or an emergency poison hotline immediately
  2. If ingestion was within two hours you may induce vomiting under professional guidance
  3. Give activated charcoal if advised by a vet
  4. Keep the pet warm and monitor breathing
  5. Transport to an emergency veterinary clinic without delay
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.

The step-by-step response, from the first minute to the vet visit, is in our Yew Plant Toxicity in Dogs and Cats emergency guide.

Open the full emergency guide: Yew Plant Toxicity in Dogs and Cats →