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

My cat ate one slug bait pellet 30 minutes ago and seems okay. What symptoms should I watch for and how soon?

Cats · Toxicity calculator

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

Short answer

Watch it closely — signs can start within 30 minutes. The first clues are often drooling, vomiting, or a wobbly, drunk-like walk. Muscle twitches, especially in the face, can quickly escalate to full-body tremors and seizures. Its body temperature can also spike dangerously high. Call your vet or the ASPCA poison line at 888-426-4435 now, and keep the cat in a cool, dark, quiet room while you get help.

Why does metaldehyde poison so quickly?

Metaldehyde is absorbed rapidly from the stomach and hits the central nervous system, causing severe tremors and seizures that can begin within 30 minutes to 3 hours. It can also raise body temperature dangerously high.

About the dose levels
Signs are possible from roughly 10 mg/kg of metaldehyde; severe seizures above ~30 mg/kg. Pellets vary between 2% and 6%.

Signs to watch for

  • Vomiting, drooling, excessive panting
  • Muscle tremors, twitching of the face
  • Incoordination, appearing "drunk"
  • Seizures, very high body temperature
  • Collapse and breathing failure in severe cases

What to do right now

  1. Call your vet now — seizures can start quickly and are hard to control at home.
  2. Do not try to make the dog vomit if it is already twitching or seizing.
  3. Bring the bait packaging to confirm the metaldehyde percentage.
  4. Keep the dog cool and calm on the way to the vet.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.

For a dose worked out against your pet's weight, use the Slug Bait (Metaldehyde) Toxicity Calculator.

Open the full calculator: Slug Bait (Metaldehyde) Toxicity Calculator →