Start with the wrapper. The type of chocolate counts for more than the size of the piece: risk is measured from 20 mg of methylxanthines per kilogram of body weight, and for a 10 kg dog that works out at roughly 87 g of milk chocolate, 36 g of dark, or 7 g of cocoa powder. If more went in, or you have no idea how much, call the clinic now — help is easiest in the first hours, while the signs appear only after 6–12.
01How much chocolate is dangerous
Type of chocolate
Methylxanthines
Threshold for a 10 kg dog
White
0.04 mg/g
~5 kg
Milk
2.3 mg/g
~87 g
Dark, semisweet
5.3–5.6 mg/g
~36 g
Unsweetened baking
15.5 mg/g
~13 g
Cocoa powder
28.5 mg/g
~7 g
Scaling to another weight is straightforward: a 5 kg dog needs half of these amounts, a 20 kg dog twice as much. White chocolate barely fits the arithmetic — reaching the threshold would take some five kilograms of it. That does not make it safe: the fat and sugar remain, and fatty food from the table is linked to pancreatitis.
Above that, the thresholds come in steps. 20 mg/kg brings vomiting, diarrhoea and heavy thirst. 40–50 mg/kg puts a strain on the heart. From 60 mg/kg come seizures. The manual puts the lethal dose of milk chocolate at about 62 g per kilogram of body weight: for a 10 kg dog that is six hundred grams and more, the scale of a forgotten box of sweets rather than a stolen square.
02What to do in the next hour
Call the clinic and give the dog’s weight, the type of chocolate and the time it happened.
Keep the wrapper: the vet works out the dose per kilogram from the ingredients.
Vomiting helps in roughly the first two hours — after that the chocolate is absorbed.
Salt, ipecac syrup, mustard and fingers down the throat are banned: that is a second poisoning.
Hydrogen peroxide is the only home measure the manual allows at all, and it comes with conditions: dogs only, only where veterinary care cannot be reached, a 3% solution at 1–2 ml per kilogram and never more than 45 ml. Vomiting is not induced at all if the dog is dull, swallows badly or is unsteady on its feet. In cats it is never induced at home.
03When the signs appear
Usually after 6–12 hours, and in severe cases the picture holds for up to three days. Vomiting, diarrhoea and thirst come first; larger doses add strain on the heart and seizures. A quiet first hour proves nothing, which is why the decision runs on the dog’s weight and the type of chocolate rather than on how it looks. The rest of what a dog must not have is in foods toxic to dogs.
Platera keeps your dog’s weight to hand
A current figure on the scales is where every dose calculation starts.
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04Frequently asked
How long does chocolate poisoning take to show?
Usually 6–12 hours, and in severe cases the signs last up to three days. Vomiting, diarrhoea and heavy thirst come first, then strain on the heart and seizures. A first hour without symptoms guarantees nothing: the decision is made on the dog’s weight and the type of chocolate.
My dog ate one square of milk chocolate — is that dangerous?
For a 10 kg dog the risk count starts at about 87 g of milk chocolate, and at 174 g for a 20 kg dog. One square is usually below that, but for a puppy or a 3–4 kg dog the same square reads very differently. Call the clinic and give both weights: the dog’s and what it ate.
Is white chocolate dangerous?
It holds almost no methylxanthines: 0.04 mg per gram against 2.3 in milk chocolate. It does not cause poisoning in the usual sense, but it stays fatty and sweet, and fatty food from the table is linked to pancreatitis in dogs.
Is chocolate dangerous for cats too?
The doses in the veterinary manual are worked out for dogs; there are no feline thresholds in it, and the canine figures cannot be transferred. All that is established is that dogs suffer more often, because they eat indiscriminately, while other species are susceptible as well. If a cat got to chocolate, call a vet instead of doing the maths.
Can I make the dog vomit at home?
Only on a vet’s instruction, only in dogs and only in the first hours. The manual allows 3% hydrogen peroxide — 1–2 ml per kilogram, never above 45 ml — strictly where veterinary care is out of reach. Salt, ipecac syrup and fingers down the throat are banned, and in cats vomiting is never induced at home.
CHOCOLATE · HOW MUCH IS TOO MUCH
