Many common human foods are toxic to dogs — some cause kidney failure within 24 hours, others can kill a small dog with a single piece of gum. Memorize this list. Post it on your fridge.
Immediately Dangerous — Never Feed These
| Food | Toxic Compound | Risk |
|---|---|---|
| Grapes & Raisins | Unknown (tartaric acid suspected) | Acute kidney failure — even tiny amounts can be fatal |
| Xylitol (sugar-free gum, peanut butter, candy) | Xylitol | Severe hypoglycemia and liver failure — very fast acting |
| Chocolate | Theobromine, caffeine | Seizures, heart arrhythmia, death — dark chocolate is most dangerous |
| Macadamia Nuts | Unknown | Weakness, hyperthermia, vomiting, tremors |
| Onions, Garlic, Leeks, Chives | N-propyl disulfide | Destroys red blood cells → anemia; garlic is 5x more toxic than onion |
| Alcohol | Ethanol | Liver and brain damage; much lower tolerance than humans |
| Coffee, Tea, Energy Drinks | Caffeine | Restlessness, tremors, rapid heart rate, collapse |
| Raw yeast dough | Ethanol (from fermentation) | Bloat, alcohol poisoning; dough expands in stomach |
| Nutmeg | Myristicin | Hallucinations, high heart rate, seizures |
| Avocado (fruit & pit) | Persin | Vomiting, diarrhea, heart failure in large quantities; pit is a choking hazard |
Xylitol is hidden in many products: sugar-free peanut butter (check before giving as a treat!), chewing gum, mouthwash, vitamins, baked goods, yogurt, and some medications. Always check labels.
Harmful in Larger Quantities
- Cooked bones — splinter and perforate intestines; raw bones are generally safer but still carry risk
- Salt / salty snacks — excessive salt causes sodium ion poisoning: vomiting, diarrhea, tremors, seizures
- Dairy — most dogs are lactose intolerant; causes gas, diarrhea; small amounts of plain cheese are usually tolerated
- Cherries, peaches, plums — pits contain cyanide; fruit flesh is not toxic but pits are dangerous
- Raw potatoes — contain solanine; cooked plain potatoes are fine in small amounts
- Tomato leaves and stems — contain solanine; ripe tomato fruit is generally safe in small amounts
- Corn on the cob — not toxic, but the cob is a common intestinal obstruction cause
- Nutmeg — toxic in any quantity
Signs of Poisoning
Mild
Vomiting, diarrhea, drooling, lethargy, loss of appetite
Moderate
Trembling, weakness, pale gums, abdominal pain, rapid breathing
Severe
Seizures, collapse, unconsciousness, bloody stool, jaundice
What to Do If Your Dog Ate Something Toxic
- Don't panic — assess how much was eaten and when
- Call your vet or ASPCA Poison Control: (888) 426-4435 immediately (24/7, small fee)
- Note the exact food, estimated amount, and your dog's weight — the vet will need this
- Do NOT induce vomiting unless specifically instructed — for some toxins it makes things worse
- Bring the food packaging to the emergency vet if going in
Prevention: Keep trash cans locked or inside a cabinet. Use baby locks on low cabinets. Educate every household member and guests — especially around holidays when dangerous foods are everywhere.
Quick Reference — Safe Human Foods
Many human foods are perfectly safe for dogs in moderation. See our full guide: Safe Human Foods for Dogs →
Quick safe list: plain cooked chicken or turkey, cooked eggs, carrots, blueberries, watermelon (no seeds/rind), plain cooked rice, pumpkin, cucumber, sweet potato (cooked), plain oatmeal, green beans, peas.