Foods Toxic to Dogs: Complete List + What to Do in an Emergency

A dog ate something off the counter, off the floor, off the picnic blanket. It happens to nearly every dog owner eventually. The first question is always the same: "Is what they ate going to hurt them?" This guide is a fast-reference list of the most common toxic foods, how much causes harm, what symptoms to watch for, and exactly what to do — including who to call and when to skip the vet and go straight to the ER.

Save or bookmark this page. The middle of an emergency is not the time to start Googling.

The most dangerous foods (act fast)

These cause serious harm at relatively small doses. Don't wait for symptoms — call a vet or poison control immediately if your dog ate any of these.

Chocolate

The classic dog toxicity, and a real one. Chocolate contains theobromine and caffeine, which dogs metabolize very slowly. Toxicity depends on chocolate type and dog size:

• Baker's chocolate / cocoa powder: Most dangerous. As little as 0.1 oz per pound of body weight can be toxic.
• Dark chocolate: Very dangerous. About 0.3 oz per pound is the rough toxic threshold.
• Milk chocolate: Less toxic but still harmful. Around 1 oz per pound for serious risk.
• White chocolate: Almost no theobromine. Generally not dangerous in terms of poisoning, but the fat content can still cause GI upset or pancreatitis.

Symptoms: vomiting, diarrhea, restlessness, increased heart rate, tremors, seizures (severe cases). Typically appear 6-12 hours after ingestion.

Grapes, raisins, and currants

One of the most dangerous foods on this list because we still don't know exactly why they're toxic or what the threshold is. Even small amounts can cause acute kidney failure in some dogs. A single raisin has caused kidney failure in small breeds; large dogs have eaten handfuls with no obvious effect — but the unpredictability is exactly what makes them dangerous.

Treat any grape or raisin ingestion as a vet emergency, regardless of dog size or amount. Symptoms: vomiting within hours, then progressive symptoms over 24-48 hours including weakness, decreased urination, kidney pain.

Xylitol (sweetener)

One of the deadliest items in this list, found in sugar-free gum, mints, peanut butter, baked goods, toothpaste, and some supplements. Read peanut butter labels carefully before letting your dog have any — several brands have switched to xylitol-sweetened formulas.

Xylitol causes a massive insulin release in dogs, leading to severe hypoglycemia within 30-60 minutes. Higher doses cause acute liver failure. Toxic dose is roughly 0.1 g per kg body weight — a stick or two of sugar-free gum can poison a small dog.

Symptoms: weakness, vomiting, collapse, seizures, often within an hour. Go to the ER immediately — don't wait for symptoms or call poison control first.

Onions, garlic, leeks, chives, shallots (Allium family)

Damage red blood cells, causing hemolytic anemia. Toxicity is cumulative — repeated small exposures can be as dangerous as one large dose. Garlic is roughly 5× more concentrated than onions.

Toxic doses: about 5 grams of onion per kg body weight (so ~3 oz for a 30 lb dog), or about 1 gram of garlic per kg. Cooked is just as toxic as raw. Onion powder, garlic powder, and broth made with onions are all problems — be especially careful with table scraps and human leftovers.

Symptoms: lethargy, weakness, pale gums, dark urine, rapid breathing. Often delayed 1-3 days after ingestion.

Macadamia nuts

Mechanism unknown, but cause distinctive symptoms in dogs. As little as 2 grams per kg can cause clinical signs. Symptoms: weakness in the hindquarters (often dramatic — dogs can't walk normally), vomiting, tremors, fever. Usually resolves within 24-48 hours with supportive care.

Alcohol

Dogs are dramatically more sensitive to alcohol than humans, with no margin for error. Beer, wine, spirits, fermented bread dough, and even alcoholic-soaked desserts can cause toxicity. Symptoms: stumbling, vomiting, weakness, low body temperature, respiratory depression, coma. This is always an emergency.

"When in doubt, call. The ASPCA Poison Control hotline costs $95 — far less than emergency vet care for poisoning you could have prevented with one phone call."

Foods that are moderately dangerous

Avocado

Contains persin, which is mildly toxic to dogs. The bigger danger is the pit — choking hazard and intestinal obstruction. Symptoms from flesh ingestion: mild vomiting and diarrhea. Most healthy dogs recover without treatment, but very young, small, or sick dogs may need vet attention. Skip avocado entirely if you can.

Cooked bones

Raw bones can be safe for dogs with vet guidance. Cooked bones are dangerous — they become brittle and can splinter, causing oral injuries, intestinal punctures, and blockages. Chicken bones are especially risky because their thin walls splinter easily. Never feed cooked bones of any kind.

If your dog has eaten cooked bones, watch closely for: difficulty defecating, bloody stool, vomiting, lethargy, abdominal pain. Many small bone fragments pass safely; some require surgery to remove.

Raw yeast dough

Bread dough containing live yeast continues to rise in a dog's warm stomach, causing bloat and producing alcohol as a fermentation byproduct. Double whammy. Causes stomach distension, vomiting, weakness, drunken behavior. Treat as an emergency.

Caffeine (coffee, tea, energy drinks)

Same family of compounds as in chocolate. Toxic threshold roughly 60 mg/kg. A single sip of coffee won't harm most dogs, but coffee grounds, used tea bags, or energy drink consumption can be serious. Symptoms similar to chocolate toxicity: hyperactivity, vomiting, tremors, elevated heart rate.

Salt (large amounts)

Excessive salt — like a dog eating an entire bag of potato chips or salty snacks — can cause sodium ion poisoning. Symptoms: excessive thirst, vomiting, diarrhea, tremors, seizures.

Raw fish (regular consumption)

Occasional cooked fish is fine. Raw fish, especially salmon, trout, and shad from the Pacific Northwest, can contain a parasite that causes "salmon poisoning disease" — a serious bacterial infection. Also, regular raw fish feeding can lead to thiamine deficiency. Cook fish thoroughly for dogs.

Nutmeg and many baking spices

Nutmeg in particular contains myristicin, which can cause hallucinations, increased heart rate, and seizures at high doses. Most baked goods don't contain enough to be dangerous, but a dog who gets into the spice cabinet can be in trouble.

Foods that are mildly problematic

Generally not life-threatening but can cause GI upset, allergic reactions, or long-term harm:

• Dairy: Most adult dogs are lactose intolerant. Small amounts of cheese or plain yogurt are usually okay; milk and ice cream often cause diarrhea.
• Fatty foods: Bacon, fatty meat trimmings, butter, fried foods. Can cause pancreatitis, especially in predisposed breeds (Schnauzers, Yorkies, small dogs in general).
• Citrus fruits: The fruit itself isn't toxic, but high acid content causes stomach upset. The peels, seeds, and stems contain essential oils that can be more problematic in large amounts.
• Spicy foods: Not toxic per se, but can irritate the GI tract.
• Mushrooms: Store-bought varieties are safe. Wild mushrooms range from harmless to deadly — never let your dog eat unidentified mushrooms outdoors.
• Stone fruit pits (peach, cherry, apricot): Contain trace amounts of cyanide and are also choking/obstruction hazards. The fruit flesh is safe.
• Apple seeds and cores: Seeds contain trace cyanide; cores can cause choking. Apple slices are fine.
• Tomato leaves and stems: Contain solanine (also found in green potatoes). Ripe tomato fruit is fine in small amounts.
• Raw potato (green parts): Solanine again. Cooked plain potato is safe.

What to do if your dog eats something toxic

The first hour matters more than anything else. The general protocol:

1. Identify what they ate, how much, and when. Take a photo of the packaging if possible. Note the time of ingestion as precisely as you can.
2. Don't induce vomiting on your own. Hydrogen peroxide vomiting was once standard advice, but is now considered risky and can cause aspiration pneumonia or stomach lining damage. Only induce vomiting if specifically instructed by a vet or poison control.
3. Call poison control or your vet immediately. Pet Poison Helpline (855-764-7661) or ASPCA (888-426-4435). They can tell you whether the amount is concerning, what to expect, and whether to head to the ER. The fee gets you toxicology expertise plus a case number that any vet can use.
4. If poison control says ER, go now. Don't drive across town for your regular vet if a closer ER is available. Time matters.
5. Bring the substance with you. Original packaging, the half-eaten item, vomitus if you have it. The more info the vet has, the faster they can treat.

Symptoms that mean "go to the ER right now"

If you see any of these after possible ingestion of something toxic — or even without a known ingestion — go to an emergency vet immediately:

• Seizures
• Loss of consciousness or unresponsiveness
• Difficulty breathing
• Severe weakness or collapse
• Pale, blue, or yellow gums
• Persistent vomiting (especially with blood)
• Bloody diarrhea
• Distended, painful abdomen
• Tremors or muscle twitching that won't stop
• Disorientation or "drunken" walking

The bottom line

Chocolate, grapes/raisins, xylitol, onions/garlic, macadamia nuts, alcohol, and raw yeast dough are the seven most important foods to keep away from dogs. Cooked bones are the silent killer that owners often don't think of as "toxic" but is responsible for many surgeries every year.

When in doubt: call poison control. The fee saves money compared to a misjudged emergency visit, and the wrong call (waiting at home when you should have gone in) can be fatal. Save the numbers in your phone now. You'll be glad you did.