Human food can expose dogs to several different risks: poisoning, choking, intestinal obstruction or digestive upset. These are not interchangeable. Risk depends on the substance, amount and individual dog; a list cannot establish that an exposure is safe.

If your dog may have eaten something harmful

Contact a veterinarian or an animal poison service promptly. Do not wait for symptoms after a potentially toxic exposure. Keep the packaging, ingredient list and any remaining material, and estimate how much was eaten and when. Tell the adviser the dog's weight and any signs you have noticed.

Do not induce vomiting or give salt, oil, milk, charcoal or other home remedies unless a veterinary professional specifically directs you. Some objects and substances can cause more harm if brought back up. If the dog is collapsing, seizing or struggling to breathe, seek emergency care immediately.

Xylitol, chocolate and caffeine

Xylitol is a sweetener found in some sugar-free gum, sweets, baked goods, supplements and other products. In dogs it can trigger a dangerous fall in blood sugar and can also cause liver injury. Check labels, including those on nut butters and dental products. A product being safe for people does not make it safe for dogs.

Chocolate contains methylxanthines, including theobromine, that can affect the heart and nervous system. Cocoa powder and darker chocolate are generally more concentrated than milk chocolate, but assessment depends on the product and amount. Coffee, energy products and caffeine tablets are also hazards. Keep the label.

Grapes, raisins and alliums

Grapes and raisins can cause acute kidney injury in dogs. Individual responses vary, so there is no dependable safe number to use at home. Consider foods containing them, such as fruitcake and some breads, as well as fruit eaten directly.

Onions, garlic, leeks and chives can damage red blood cells. Cooking or drying does not reliably remove that risk, and concentrated powders may be present in sauces, soups or seasoning mixes. Do not use garlic as a homemade parasite treatment. Check baby food and other prepared foods for ingredients before offering even a small amount.

Alcohol, raw dough and hops

Alcohol exposure can cause serious poisoning. Drinks, alcohol-containing food and fermenting material should be inaccessible. Unbaked yeast dough can expand in the stomach and produce alcohol as it ferments; this is different from an ordinary small piece of fully baked bread.

Hops used in home brewing are another dangerous exposure. Keep brewing ingredients and discarded material in secure containers, including used hops. Call for advice if a dog gains access rather than judging safety by whether the material looks spent or dry.

Bones, cobs and fruit pits

Cooked bones can splinter, while raw bones can also break teeth, lodge in the digestive tract or carry germs. A dog that has swallowed a bone needs an individual assessment. Do not assume that normal behavior immediately afterward rules out a later problem.

Corn cobs can obstruct the intestine even though plain cooked kernels are not inherently poisonous. Peach and plum pits, avocado stones, skewers and food wrappers can also create choking or obstruction risks. Keep waste secure and account for missing packaging as well as missing food.

Apple flesh is different from its core and seeds. Remove cores and seeds before offering a small piece; concentrated exposure to crushed seeds presents a different concern from a tiny accidental ingestion. With avocado, gastrointestinal upset and the large stone are practical risks for dogs. Claims that every bite causes a heart attack are misleading.

Nuts, fat, salt and unsuitable diets

Macadamia nuts can poison dogs, causing signs such as weakness, vomiting and tremors. Rich fatty scraps can cause digestive upset and may contribute to pancreatitis in susceptible dogs. Excessive salt can also cause poisoning. Avoid using leftovers, bacon grease or heavily seasoned food as routine additions. A nutritionally complete dog food should provide the foundation of the diet.

An occasional stolen mouthful of cat food is not the same as a poisoning emergency, although it may upset digestion. Cat food is not a suitable long-term replacement for dog food. Milk may cause diarrhea in dogs that digest lactose poorly. Large amounts of liver over time can create nutritional imbalance, including excessive vitamin A.

Raw meat, raw fish and raw eggs can carry disease-causing organisms, and a homemade raw menu may be nutritionally incomplete. Do not add human vitamins or iron supplements without veterinary direction; the dose and ingredients can be dangerous.

Spoiled food and non-food products

Moldy food and compost may contain toxins that cause tremors and other serious illness. Do not allow scavenging from rubbish, garden compost or discarded picnic food. Wild mushrooms cannot be judged safe by appearance alone; take photographs or a sample safely if a veterinarian asks for identification.

Nicotine products and cannabis are also poisoning hazards. Edibles may combine cannabis with chocolate or xylitol, while nicotine can be present in pouches, gum, cigarettes and vaping supplies. Describe all ingredients honestly so the veterinary team can choose the right response.

Prevent repeat exposures

Keep food, medicines and supplements in closed cupboards and use bins a dog cannot open. Ask visitors to put bags containing gum or medicines out of reach. During cooking, place the dog behind a comfortable barrier and offer an appropriate activity.

Teach leave it and a rewarded trade for objects, but use physical prevention as the main protection. Keep your veterinary practice and nearest emergency clinic details accessible. Quick, accurate information is more useful in an emergency than guessing from a food list or waiting for the dog to look unwell.