Why stew makes this harder to assess
A 15 kg dog eating several spoonfuls of contaminated stew creates a tricky situation. The liquid and vegetable matter may have dispersed the pellets unevenly, making it impossible to guess the exact dose consumed. Unlike dry pellets that are easily counted, the stew could have concentrated metaldehyde in certain bites or diluted it across the whole meal. Either way, the toxin remains fully active once absorbed.
Metaldehyde doesn't break down during cooking, and the fats in the stew might actually speed up absorption in the intestines. Watch for early signs like drooling, restlessness, or unsteadiness—these can appear before the classic tremors. The first 90 minutes are critical for intervention, as seizures often start suddenly and escalate rapidly in dogs this size.
How body weight affects metaldehyde poisoning
At 15 kg, your dog is in the mid-weight range where metaldehyde toxicity becomes life-threatening with relatively small amounts. Slug bait pellets typically contain 3-5% metaldehyde, meaning just a teaspoon of pure pellets could deliver a dangerous dose. Mixed into stew, even a few spoonfuls may contain fragments totaling that amount.
Larger dogs sometimes buy time with slower absorption rates, but your dog's size means symptoms will likely develop quickly. The tremors themselves burn enormous energy—a seizing 15 kg dog can overheat to dangerous temperatures within 20 minutes. Cooling measures during transport help, but only veterinary anticonvulsants can stop the neurological cascade.
The risk window for mixed-ingestion cases
Unlike pellets eaten directly, metaldehyde in stew may take slightly longer to cause symptoms—but not enough to relax. The first signs usually appear within 30-60 minutes, but we've seen delayed reactions up to two hours when food slows stomach emptying. This doesn't make the toxin less dangerous; it just stretches the observation period.
Record the exact time of ingestion and monitor continuously, not intermittently. If it's been under an hour, the vet may induce vomiting professionally, but after that window passes, the priority shifts to controlling neurological symptoms. Bring a sample of the stew if possible—seeing pellet fragments helps estimate exposure.
Why you can't wait for symptoms
By the time muscle twitches or vomiting appear, metaldehyde has already entered the bloodstream. This toxin doesn't give gradual warnings—mild tremors often progress to full seizures within minutes. For a dog that ate an unknown quantity in stew, waiting to "see if symptoms develop" could mean waiting until it's too late for effective treatment.
Emergency vets typically start with IV fluids to protect the kidneys and medications to prevent seizures before they begin. Blood tests won't show metaldehyde levels in time to guide treatment, so decisions are based on exposure likelihood. Your description of blue pellet fragments in stew is enough evidence to warrant immediate aggressive care.
For a dose worked out against your pet's weight, use the Slug Bait (Metaldehyde) Toxicity Calculator.