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Toxic Foods for Dogs: What to Avoid

Some human foods can make dogs seriously ill, while others are best left out of the bowl for more everyday reasons — choking, obstruction, fat, salt or seasonings. This hub separates the two, links straight through to the detailed guide for each food, and covers what to do if your dog has already eaten something worrying.

How we label foods. We use TOXIC for foods with a recognised poisoning risk, and AVOID for foods we recommend not feeding for other safety reasons — choking, obstruction, fat, salt or seasonings — or simply because the risk outweighs any benefit. The two groups are not the same thing, so they are listed separately below.

Foods that can be toxic to dogs

These are the foods in our library with a recognised poisoning risk. Each one has a detailed guide covering the specifics, hidden sources and what to do after an ingestion.

  • Xylitol

    TOXIC

    A sugar alcohol used in sugar-free gum, sweets, some peanut butters and dental products. In dogs it can cause a rapid, severe drop in blood sugar, and liver injury has also been reported.

    Read our xylitol guide

  • Chocolate

    TOXIC

    Chocolate contains methylxanthines (theobromine and caffeine) that dogs clear slowly. How serious an exposure is depends on the type of chocolate, the amount and the size of the dog — darker chocolate and cocoa powder generally contain more than milk chocolate.

    Can dogs eat chocolate?

  • Coffee

    TOXIC

    Coffee, espresso, beans and used grounds all contain caffeine, a stimulant dogs are more sensitive to than we are. Grounds and beans are far more concentrated than a brewed cup, and effects can include agitation, a racing heart, tremors and seizures.

    Read our coffee and caffeine guide

  • Grapes

    TOXIC

    Grapes have been associated with acute kidney injury in dogs. Individual sensitivity is unpredictable and no reliably safe amount has been established.

    Learn more about grapes and dogs

  • Raisins

    TOXIC

    Raisins, sultanas and currants are dried grapes and carry the same kidney concern in a more concentrated form. They hide in fruit cake, cereals, trail mix and baked goods.

    Read our raisins guide

  • Onions

    TOXIC

    Onions are Alliums, and Allium exposure can damage a dog's red blood cells. Raw, cooked, dried and powdered onion all count, including onion in stocks, sauces and seasoned leftovers.

    Can dogs eat onions?

  • Garlic

    TOXIC

    Garlic is also an Allium and belongs in the same category as onion, including garlic powder, garlic bread and garlic supplements sold for dogs.

    Can dogs eat garlic?

  • Macadamia Nuts

    TOXIC

    Macadamias cause a recognised, dog-specific toxicosis with weakness, wobbliness and vomiting. The responsible compound is still uncertain; most dogs recover with veterinary care, but no amount is an appropriate treat.

    Read our macadamia nut guide

  • Alcohol

    TOXIC

    Alcohols are absorbed readily from the gut and through skin and can rapidly cause inebriation, metabolic acidosis, low body temperature and central-nervous-system depression; severe cases can lead to coma, seizures or death, and there is no specific antidote.

    Read the full alcohol guide

  • Chives

    TOXIC

    Chives belong to the Allium plant group, together with onion, garlic and leek. Veterinary sources list chives among the Allium species involved in poisoning in dogs. The compounds can damage red blood cells, and signs may appear only after several days.

    Read the full chives guide

  • Hops

    TOXIC

    Hops (Humulus lupulus), including used hops from home brewing, can cause dangerous hyperthermia. Contact a veterinarian urgently if your dog eats any.

    Read the full hops guide

  • Leeks

    TOXIC

    Leeks are an Allium vegetable, closely related to onion and garlic. Veterinary sources list leeks among the Allium species that can poison dogs by damaging red blood cells. Signs may appear only after several days.

    Read the full leeks guide

  • Tea

    TOXIC

    Tea leaves and tea bags concentrate caffeine and can cause serious toxicity. This page covers tea from the Camellia sinensis plant only.

    Read the full tea guide

  • Yeast dough

    TOXIC

    The warm stomach keeps the yeast working, so raw dough can go on expanding inside the dog, and the same fermentation produces alcohol that is absorbed into the blood. Baked bread is a different question.

    Read the full yeast dough guide

Other foods we recommend avoiding

These are not classic dog poisons. We still suggest leaving them out of your dog's bowl, and the reasons are practical rather than toxicological.

  • Almonds

    AVOID

    Ordinary sweet almonds are not a classic dog poison in the way macadamia nuts are. The practical problems are choking and obstruction with whole nuts, the fat load, and the salt, coatings and flavourings on most almond products.

    Can dogs eat almonds?

  • Avocado

    AVOID

    Dogs are far less sensitive to persin than birds and some livestock, so a lick of ripe flesh is not the emergency the internet suggests. We still say no: the pit is a choking and obstruction hazard, the fat can upset digestion, and guacamole usually contains onion and garlic.

    Learn more about avocado and dogs

  • Bacon

    AVOID

    Bacon is cured, salty and very fatty. It is not treated as a canine toxin, but it is not a treat we would offer.

    Read the full bacon guide

  • Cherries

    AVOID

    The flesh is not the main concern — the pits, stems and leaves contain cyanogenic compounds, and pits can choke or block. Since safer fruits exist, we recommend skipping cherries entirely.

    Can dogs eat cherries?

  • Chili peppers

    AVOID

    Capsaicin in chili, jalapeño and cayenne peppers causes irritation and burning. Sweet bell peppers are a different food with their own page.

    Read the full chili peppers guide

  • Grapefruit

    AVOID

    We recommend not feeding grapefruit. The flesh is not toxic, but it is very sour and can irritate a dog's stomach, and the peel, rind and seeds contain essential oils and psoralens. A lick or a small bite of flesh is not a poisoning emergency.

    Read the full grapefruit guide

  • Ham

    AVOID

    This page is about cured or salted ham. Salt and fat content vary between products, and glazes, pan juices and bones each need separate consideration.

    Read the full ham guide

  • Ice Cream

    AVOID

    Three separate things matter: lactose, fat and sugar, and particular ingredients such as xylitol or chocolate that are genuinely toxic to dogs.

    Read the full ice cream guide

  • Lemons

    AVOID

    Lemons are intensely sour and acidic, and they are not a food dogs should be offered. A tiny taste of flesh usually causes nothing worse than a grimace, but peel, pith and citrus oils are more of a concern, and larger amounts can upset the gut.

    Read the full lemons guide

  • Limes

    AVOID

    We recommend not feeding limes. The flesh is very sour and can irritate a dog's stomach, and large amounts have been linked to more serious signs. The peel and rind contain essential oils and psoralens and can cause a blockage. A small lick is not a poisoning emergency.

    Read the full limes guide

  • Mushrooms

    AVOID

    Ordinary grocery-store mushrooms are not considered toxic to dogs — the serious poisoning risk comes from wild and unidentified species, some of which can be life-threatening. Because identification is difficult, we recommend keeping dogs away from mushrooms as a category.

    Can dogs eat mushrooms?

  • Nutmeg

    AVOID

    Nutmeg contains a toxin called myristicin. A recipe amount is very unlikely to cause serious toxicity, though mild stomach upset could occur; a very large amount is a different matter.

    Read the full nutmeg guide

  • Pecans

    AVOID

    We recommend not feeding pecans. They are high in fat, whole nuts and shells can cause choking or a blockage, and mouldy pecans can contain toxins that cause tremors and seizures. A single dropped, fresh pecan is unlikely to harm a healthy dog.

    Read the full pecans guide

  • Pistachios

    AVOID

    We recommend not feeding pistachios. Shells and whole nuts can cause choking or a blockage, pistachios are often sold salted, the nuts are high in fat, and they can carry mould toxins even when no mould is visible. A few plain nuts are unlikely to harm a healthy dog.

    Read the full pistachios guide

  • Pomegranate

    AVOID

    We recommend not giving pomegranate to dogs. It can upset the stomach, and the tough peel (rind) carries more concern than a few seeds, including a risk of blockage. If your dog ate one or two seeds, that is unlikely to cause serious harm. Commercial dog foods that list pomegranate as an ingredient are a different question.

    Read the full pomegranate guide

  • Salt

    AVOID

    Do not add salt to treats or table scraps for your dog. If you know your dog ate only a small bite of an ordinary salted food, that is different from eating loose salt, salt dough or de-icing salt, or drinking seawater.

    Read the full salt guide

  • Sausage

    AVOID

    A sausage is a processed product, and depending on the recipe it can carry a lot of salt, a lot of fat, and seasonings that matter. Plain, unseasoned cooked meat is a separate question.

    Read the full sausage guide

  • Star fruit

    AVOID

    Sour star fruit can cause serious toxicity. Sweet star fruit has much less oxalate, but you can't always tell which you have, and kidney health changes the risk.

    Read the full star fruit guide

  • Walnuts

    AVOID

    Common English walnuts are not a classic dog poison, but fat, choking, shells, mouldy fallen nuts and the more concerning black walnut stack up. We recommend skipping them rather than treating every walnut as an emergency.

    Read our walnut guide

What should I do if my dog ate something toxic?

Some exposures need action before any symptoms appear, so don't wait to see whether your dog becomes unwell before making the call.

  1. Take the food, packet or plant away so your dog cannot eat more.
  2. Work out what was eaten and roughly how much, if you can.
  3. Note approximately when it happened — timing changes what your vet advises.
  4. Keep the packaging or ingredient label to hand; sweeteners and chocolate percentages matter.
  5. Contact your veterinarian or an animal poison service promptly for anything on the toxic list, even if your dog seems completely fine.

Don't try to make your dog vomit or give any home remedy unless a veterinary professional has told you to do it.

Possible signs of poisoning

Signs vary a lot depending on the substance, the amount and the dog, and no single food causes all of them. Some dogs show very little early on. This list is a prompt to seek advice, not a way to rule a problem out.

  • Vomiting or diarrhoea
  • Sudden weakness or lethargy
  • Tremors or muscle twitching
  • Wobbly or unco-ordinated walking
  • A racing, slow or irregular heartbeat
  • Pale gums
  • Unusual thirst or urination
  • Restlessness or agitation
  • Seizures or collapse in severe cases

Frequently asked questions

The names that appear most consistently on veterinary toxin lists are xylitol, chocolate, grapes and raisins, onions and garlic, and macadamia nuts. Alcohol and raw yeast dough belong on the same list. Each of these has its own detailed guide on Kyo's Kitchen with the specific concerns and what to do after ingestion.

Take the food away, work out what and roughly how much was eaten and when, keep the packaging or ingredient label if you have it, and contact your veterinarian or an animal poison service promptly. Don't try home remedies or try to make your dog sick — only do that if a veterinary professional specifically tells you to.

Sometimes, yes. With xylitol and with grapes or raisins, small exposures can matter and there is no amount we would describe as reliably safe. With other foods, such as chocolate, the picture depends on the product, the amount and the size of the dog — which is exactly why it is worth calling rather than guessing.

Not every dog that eats grapes develops kidney injury, but there is no way to predict which dogs will react and no established safe dose. That unpredictability is why the standard advice is to treat any grape, raisin, sultana or currant ingestion as worth a call to your vet.

Cooking does not remove the Allium compounds that concern vets, and dried or powdered forms are more concentrated by weight than fresh. That means onion gravy, garlic bread, stocks, curries and seasoned leftovers all count rather than being safe alternatives.

No. On Kyo's Kitchen, TOXIC means there is a recognised poisoning risk. AVOID is our conservative recommendation for foods where the practical risk — choking, obstruction, fat, salt or seasonings — outweighs any benefit, even though the food is not a classic dog poison. Almonds, avocado and cherries sit in that second group.

Sources

General toxicology guidance on this page draws on the sources below. Each ingredient guide carries its own, food-specific references.

Kyo's Kitchen is written around one very food-motivated dog. Everything here is about keeping the kitchen safe — browse the full A–Z of dog foods to check anything that isn't listed above.

This guide is for general educational purposes and isn't a substitute for advice from your veterinarian. If your dog has eaten something potentially toxic or is showing concerning symptoms, contact a veterinarian promptly.