What Can't Dogs Eat? The List of Toxic Foods
Medical note
These guide articles do not replace veterinary advice, diagnosis or treatment. If anything is unclear, or in case of acute symptoms or an emergency, please contact a vet, an emergency veterinary service or an animal hospital immediately.
From chocolate to grapes to xylitol: the most important toxic foods, typical symptoms of poisoning, and what to do in an emergency.
Many foods that are harmless to us can be dangerous for dogs. Three factors are usually decisive: which substance was ingested, how much of it, and the dog's weight. This overview shows you the most important risks, typical symptoms, and the correct procedure in an emergency.
Don't Delay in Suspected Cases
If you suspect poisoning, your vet's office or an animal emergency clinic is the right place to go—even at night. This guide is not a substitute for professional veterinary advice.
The Most Important Toxic Foods
| Food | Why Problematic | What to Look Out For |
|---|---|---|
| Chocolate & Cocoa | Theobromine, which dogs metabolize very slowly | The darker the chocolate, the more dangerous; baking cocoa is especially critical |
| Xylitol (Birch Sugar) | Causes severe hypoglycemia, can damage the liver | Found in chewing gum, sugar-free sweets, some baked goods, and toothpaste |
| Grapes & Raisins | Can lead to acute kidney failure | The critical amount varies greatly individually—any amount is considered a risk |
| Onions, Garlic, Leeks | Damage red blood cells | Also applies to cooked, dried, or powdered forms in prepared foods |
| Alcohol | Strongly affects the nervous system even in small amounts | Also in liqueur chocolates, raw yeast dough, and fermented fruit |
| Raw Yeast Dough | Continues to ferment in the stomach, producing gas and alcohol | Risk of gastric torsion, especially in large dogs |
| Macadamia Nuts | Cause weakness, tremors, and vomiting | Even small amounts can cause symptoms |
| Avocado | Contains persin; the pit is also a choking hazard | Dogs are less sensitive than birds, but caution is still advised |
Recognizing Symptoms of Poisoning
Poisoning rarely shows up immediately. Depending on the substance, it can take minutes to many hours. Sudden changes in behavior or digestion are particularly noticeable.
- Vomiting, diarrhea, or excessive drooling
- Tremors, restlessness, muscle twitching, or seizures
- Weakness, stumbling, lethargy
- Very fast or unusually slow heartbeat, panting
- Pale or reddened mucous membranes
- Unusually increased drinking and urination, or lack of urination
What to Do if You Suspect Poisoning?
- 1Stay calm and remove the dog from the source.
- 2Secure any leftovers, packaging, or take a photo—this information greatly helps the vet.
- 3Immediately call your vet or an animal emergency clinic and state the amount and time of ingestion.
- 4Do not induce vomiting on your own: for corrosive substances or petrol, this can cause additional harm.
- 5Do not give home remedies like milk or salt.
- 6Observe the dog on the way to the vet and note any changes.
Quantity Matters
A crumb of milk chocolate is usually not critical for a large dog, but the same amount of dark chocolate can be for a small dog. When in doubt, always call instead of waiting.
Frequently asked questions
How much chocolate is dangerous for a dog?
That depends on the cocoa content and the dog's weight. Dark chocolate and baking cocoa contain significantly more theobromine than milk chocolate. Since the critical amount cannot be given as a general rule, you should call your vet and state the type, quantity, and weight.
Are grapes really toxic for all dogs?
Not every dog reacts the same way, but there have been cases of acute kidney failure after small amounts. Therefore, grapes and raisins are generally considered a risk and should not be within a dog's reach.
Should I make my dog vomit?
Only under veterinary instruction. For corrosive substances, oils, or if the dog is already disoriented, vomiting can increase the damage.
When do the first symptoms appear?
Depending on the substance, it can take anywhere from a few minutes to several hours. Therefore, a dog showing no symptoms immediately after ingestion does not mean it's out of danger.