Chocolate, grapes, onions – what is harmless or even healthy for us can be life-threatening for your dog. Their metabolism works differently from ours. Many everyday foods that are on the table or in the pantry at our home are highly toxic to dogs.
In this guide you will find a complete overview of all dangerous foods – with danger levels, symptoms and a clear emergency checklist. This way you will know immediately what to do in case of emergency.
Table of Contents
Toxic Foods for Dogs: The Overview
Chocolate / Cocoa |
⚠️ DEADLY |
Restlessness, racing heart, vomiting, seizures (theobromine) |
Xylitol (birch sugar) |
⚠️ DEADLY |
Insulin shock, drop in blood sugar, liver failure |
Grapes / Raisins |
⚠️ DEADLY |
Vomiting, kidney failure – even small amounts! |
Onions / Garlic / Leeks |
⚠️ DEADLY |
Destruction of red blood cells, paleness, anemia |
Macadamia Nuts |
HIGH |
Fever, hind limb paralysis, vomiting, tremors |
Avocado |
HIGH |
Myocardial damage (persin), vomiting, diarrhea |
Caffeine (coffee, tea, energy drinks) |
HIGH |
Racing heart, tremors, seizures, restlessness |
Raw Pork |
HIGH |
Aujeszky virus: brain/spinal cord damage, fatal |
Alcohol / raw yeast dough |
HIGH |
Intoxication, stomach twisting, respiratory arrest |
Raw legumes |
MEDIUM |
Phasin: clumping of blood cells, diarrhea |
Fruit pits (cherry, plum) |
MEDIUM |
Cyanide when bitten, choking hazard |
Salt / spicy seasonings |
MEDIUM |
Kidney damage, salt poisoning, gastrointestinal issues |
Milk / dairy products |
LOW |
Lactose intolerance: bloating, diarrhea |
Cooked bones |
LOW |
Splinters, intestinal obstruction, internal injuries |
The Most Dangerous Foods in Detail
1. Chocolate and Cocoa (Theobromine)
Chocolate is probably the best-known toxic food for dogs – and yet most accidents happen with it. The culprit is called theobromine. Dogs lack the enzyme to break down this substance quickly.
Symptoms appear just 2–4 hours after ingestion: extreme restlessness, intense thirst, heart rhythm disturbances, vomiting, diarrhea and cramps. The darker the chocolate, the more dangerous it is. Dark chocolate and baking chocolate contain the most theobromine.
2. Onions, Garlic and Leeks (Allium sp.)
All plants of the genus Allium are toxic to dogs – whether raw, cooked, dried or as powder. This includes onions, garlic, leeks, spring onions, shallots and chives.
They contain N-propyl disulfides, which destroy red blood cells. This leads to life-threatening anemia. Symptoms: pale mucous membranes, racing heart, shortness of breath, reddish urine. Even small amounts over a long period are dangerous.
⚠️ Caution: Garlic is sometimes recommended as a “natural tick repellent.” This is a dangerous myth!
3. Grapes and Raisins
Whether red, green, seedless, organic or from your own garden – all grapes and raisins are toxic to dogs. The exact toxin has not yet been conclusively identified. What is certain: They can cause acute kidney failure.
The tricky thing: Sensitivity varies greatly from dog to dog. Some show severe symptoms after just a few grapes, while others initially seem unharmed. Raisins are even more dangerous than fresh grapes due to their concentration.
⚠️ Guideline: Even 10 grapes can be toxic to a 5-kg dog. Do not take any risks!
4. Avocados (Persin)
Avocados contain persin – a toxin that can cause myocardial damage in dogs. The pit is doubly dangerous: It contains persin and can also cause an intestinal obstruction. In addition, the high fat content is problematic and can trigger pancreatitis.
5. Sweetener: Xylitol / Xylitol (Birch Sugar)
The sugar substitute xylitol is found in chewing gum, toothpaste, light products, diabetic cakes and even globules. Harmless for humans – a silent killer for dogs.
Xylitol triggers a massive insulin release in dogs. Blood sugar plummets. Without treatment, acute liver failure is imminent. Symptoms appear after just 20–60 minutes: weakness, staggering, vomiting, cramps.
⚠️ Even 0.1 g per kg of body weight can be life-threatening. 1–2 pieces of chewing gum are enough for a 5-kg dog.
6. Macadamia nuts
The exact toxin has not yet been identified. But the effect is clear: shortly after ingestion, dogs show high fever, vomiting, tremors and paralysis – especially in the hind legs. Affected dogs are often no longer able to stand on their own.
The good news: In most cases, dogs recover within 24–48 hours. Nevertheless, every case should be seen by a veterinarian.
7. Caffeine (coffee, tea, energy drinks)
Caffeine affects dogs much more strongly than humans. It is found in coffee, black and green tea, cocoa, guarana and energy drinks.
Symptoms resemble theobromine poisoning: extreme restlessness, racing heart, tremors, panting and seizures. Especially with small dogs, even small amounts are enough.
8. Raw pork (Aujeszky's disease virus)
Raw or insufficiently heated pork can transmit Aujeszky's disease virus. Harmless to humans, it is almost always fatal to dogs. The virus affects the brain and spinal cord.
Symptoms 1–2 days after ingestion: apathy or sudden aggression, severe itching, vomiting, diarrhea, paralysis. There is no cure – only prevention by consistently avoiding it.
9. Alcohol and raw yeast dough
Even the smallest amounts of alcohol are toxic to dogs. This also includes gravies with wine, desserts with rum and fermented fruit.
Raw yeast dough is particularly treacherous: It continues to ferment in the warm dog stomach, producing alcohol and gases. This can lead to a life-threatening bloat.
Other foods that dogs should not eat
- Raw legumes: Uncooked beans, lentils and chickpeas contain phasin. It clumps red blood cells and causes severe gastrointestinal symptoms. Cooked, simple peas are okay in small amounts.
- Fruit pits: Pits from cherries, plums, apricots and peaches contain cyanide. There is a danger if they are bitten. Whole pits can also pose a choking hazard.
- Salt and spicy seasonings: Chips, pretzels, highly seasoned food – damages the kidneys over time. Especially dangerous for dogs with heart or kidney weakness.
- Milk and dairy products: Many dogs are lactose intolerant. Milk leads to bloating, stomach pain and diarrhea. Quark and plain yogurt are often better tolerated.
- Cooked bones: They splinter easily and can pierce the intestine or cause an intestinal blockage. Raw, meaty bones are okay under expert guidance.
- Mushrooms: Many wild mushrooms are also toxic to dogs. When in doubt: treat all wild mushrooms as toxic. Especially the green death cap is extremely dangerous.
- Spoiled food: Moldy and rotting food is a breeding ground for bacteria and mycotoxins. Secure your trash cans!
Nightshade myth: Are tomatoes and peppers toxic?
Short answer: It depends.
Nightshades (tomatoes, potatoes, eggplants, peppers) contain solanine – a toxin that is concentrated mainly in unripe fruit, green spots and leaves. Raw, green or sprouting potatoes are toxic to dogs.
The good news: Ripe tomatoes, cooked potatoes and ripe peppers are harmless. Solanine is largely destroyed during cooking. Potatoes are even an ingredient in many high-quality dog foods.
Dangers away from the kitchen: plants, garden and walks
Toxic houseplants:
Monstera, ivy, aloe vera, peace lily, dieffenbachia, poinsettia, oleander and ficus are just some of the plants that are toxic to dogs. Keep them out of reach or replace them with dog-safe alternatives. Here you can find recommendations for safe houseplants for dogs.
Garden and walking dangers:
- Rat poison and slug pellets are extremely toxic
- Pesticides on field crops and in puddles
- Fertilizers and herbicides
- Poison baits from animal haters
- Carrion and feces of other animals (bacteria, parasites)
- Windfall fruit (fermented fruit = alcohol!)
First aid: What to do if poisoning is suspected?
⚠️ IMPORTANT: If poisoning is suspected, never induce vomiting yourself unless expressly instructed by a veterinarian!
Step-by-step in an emergency:
- Stay calm. Panic helps neither you nor your dog.
- Secure the toxin. What did your dog eat? How much? When? Take the packaging/remains with you.
- Call a veterinarian or animal clinic immediately. Let them know you are on your way so no time is lost.
- Observe and document symptoms. Vomiting, tremors, staggering, altered breathing – every piece of information helps the veterinarian.
- Do not give water or food without consulting the veterinarian.
- Know the 24-hour animal clinic. Save the number of your nearest animal clinic in your phone – before an emergency occurs.
Bello's tip:
Poisoning symptoms often occur in phases. Just because your dog still seems "normal" after an hour does not mean everything is okay. Always go to the veterinarian if poisoning is suspected.
Our HelloBello conclusion
Even though it is often incredibly difficult for us humans to resist the sweet, begging look of our dogs at the dinner table: A strong and consistent attitude protects the life of your best friend!
Individual tolerance limits vary from animal to animal, and often small doses of poison add up over time to a massive problem. With an extremely high-quality, gently cooked and nutritionally complete dog food like our HelloBello fresh food, your beloved pet is already supplied with all the essential nutrients and vitamins it needs for a long, happy life. So an extra piece of our human food is not necessary at all!
Sources
Bough, 2011
CliniPharm, CliniTox. VetMed Zurich
Dolder, 2013
Fritz, 2015: Hunde barfen – Alles über Rohfütterung
Harvey and Rackear, 1985
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