We’ve covered several individual foods in depth elsewhere in this section — chocolate, grapes, onions — but I wanted one page that pulls the full danger list together in one place, the kind of thing worth bookmarking rather than searching for again mid-panic.
Quick disclaimer: I’m a pet parent and content researcher, not a veterinarian. If your dog has eaten any food on this list, contact your vet or a pet poison helpline immediately rather than waiting for symptoms — for many of these, acting early meaningfully changes the outcome.
The complete list
| Food | Why it’s dangerous | Read more |
|---|---|---|
| Chocolate | Theobromine and caffeine affect the heart, nervous system, and respiratory system — dogs can’t metabolize it like we do | Full guide |
| Grapes & raisins | Unpredictable, can cause kidney failure from even a small amount | Full guide |
| Onions, garlic, leeks (alliums) | Damage red blood cells, causing anemia — toxic raw, cooked, or powdered | Full guide |
| Xylitol | An artificial sweetener (in “sugar-free” gum, peanut butter, baked goods) causing dangerous low blood sugar and liver damage | — |
| Alcohol | Even small amounts can cause vomiting, coordination loss, breathing difficulty, and in serious cases, coma | — |
| Macadamia nuts | Cause weakness, tremors, and hyperthermia, usually appearing within 12 hours | — |
| Avocado | Contains persin, which can cause vomiting and diarrhea in dogs (dogs are less sensitive than birds/some other animals, but it’s still best avoided) | — |
| Coffee & caffeine | Similar mechanism to chocolate toxicity — affects heart rate and the nervous system | — |
| Raw bread dough | Yeast expands in the stomach and produces ethanol, causing both bloat-like distension and alcohol toxicity | See our bread safety guide |
| Excess milk/dairy | Many adult dogs are lactose intolerant to some degree — not acutely toxic, but a common cause of diarrhea and gas | — |
Per the ASPCA’s official list, these are consistently flagged across veterinary toxicology sources — this isn’t a random internet compilation, it reflects the same foods poison control centers actually see.
General symptoms that mean “call now,” regardless of the food
- Vomiting or diarrhea that starts suddenly after eating something new
- Tremors, seizures, or loss of coordination
- Rapid or difficult breathing
- Unusual lethargy or collapse
- Pale or discoloured gums
- Changes in urination (color, frequency, or amount)
What to do if your dog eats something on this list
- Figure out what and roughly how much, if you can
- Call your vet or a pet poison helpline immediately — don’t wait to see if symptoms appear, since for several of these (grapes, xylitol, chocolate), delayed action measurably worsens outcomes
- Don’t induce vomiting on your own without professional guidance — for some substances it helps, for others it can make things worse
- Keep any packaging (to identify ingredients/quantities) to show your vet
A simpler way to think about it day to day
Rather than trying to memorize every item, the practical habit that actually works: treat anything you wouldn’t recognize as “plain dog food” with a moment’s pause before sharing — check ingredient lists on anything processed, keep alcohol and sweetened products out of reach, and be especially careful during festivals and family meals when unfamiliar dishes and desserts are more likely to be within your dog’s reach.
Frequently asked questions
Is this list complete, or are there other foods to worry about?
This covers the most commonly cited and highest-risk items, but toxicology guidance evolves and individual dogs can react differently to less common substances — when in doubt about any food not listed here, a quick call to your vet or a poison helpline is always the safer move.
Do small dogs need to worry more than large dogs?
Generally yes, in the sense that a given amount of a toxic substance affects a smaller dog more per kilogram of body weight — but for foods like grapes, the reaction is unpredictable enough that size isn’t a reliable safety margin either way.
What number should I call if my dog eats something toxic?
Your regular vet first if they’re reachable, or the nearest emergency veterinary clinic — keeping that number saved in your phone in advance is worth doing before you need it, not during a panic.
Are there foods on this list that are fine in tiny amounts?
For grapes, xylitol, and alcohol specifically, there’s no established “safe small amount” — treat those as an absolute no. For others like avocado or excess dairy, risk scales more with quantity, but “how much is too much” isn’t worth testing at home.
