Every “can dogs eat…” search has the same real question behind it: my dog just ate this — is it a problem? Most pages answer with a single word. That’s rarely enough, because for almost every human food the honest answer is a quantity, not a yes or no. A grape is dangerous at any size. A strawberry is fine. A piece of cheese is fine for one dog and a bad idea for another.
This page is the whole picture in one place: what’s safe, what’s genuinely dangerous, how much is too much, and — the part most guides skip — exactly what to do in the UK if your dog has eaten something toxic, including what it costs.
⚠️ Quick Answer
The foods that send UK dogs to emergency vets are chocolate, grapes and raisins, xylitol (birch sugar), onions and garlic, and macadamia nuts — with grapes and xylitol the two where even small amounts justify an immediate call. Most fruit, vegetables, plain cooked meat and plain rice are safe in moderation. “Moderation” has a number: treats and extras should stay under about 10% of daily calories, with the other 90% from complete dog food. If your dog has eaten something on the red list, call your vet now — do not wait for symptoms and do not try to make your dog vomit unless a vet tells you to.
The Safe and Toxic Food List
Green means safe in sensible amounts. Amber means occasional and small, or safe only when prepared correctly. Red means contact your vet.
| Food | Verdict | What actually matters |
|---|---|---|
| Apples | 🟢 Safe | Remove core and pips. Pips contain a trace of cyanide compound — harmless in ones and twos, worth avoiding as a habit. Good crunchy low-calorie treat. |
| Bananas | 🟢 Safe | High in sugar for their size — a few slices, not half a banana for a small dog. Useful for hiding tablets. |
| Blueberries | 🟢 Safe | One of the better treats — low calorie, no preparation needed, easy to portion. Frozen ones work in hot weather. |
| Strawberries | 🟢 Safe | Remove the leafy top, cut for small dogs. Sugary, so a few rather than a bowlful. |
| Carrots | 🟢 Safe | Raw or cooked. Whole raw carrots are a decent chew for dental interest — but supervise, and cut into sticks for small or gulping dogs. |
| Plain cooked rice | 🟢 Safe | The classic bland-diet ingredient with plain chicken. Plain means no salt, stock, onion or spice — stock cubes are the common mistake here. |
| Eggs (cooked) | 🟢 Safe | Scrambled or boiled, no butter, oil or salt. Avoid raw — salmonella risk and avidin binds biotin over time. |
| Salmon (cooked, boneless) | 🟢 Safe | Cooked only, bones out. Never raw — raw salmon carries a parasite risk. Good source of omega-3. |
| Sweetcorn (off the cob) | 🟡 Amber | The kernels are harmless. The cob is the danger — it doesn’t break down and is a classic cause of intestinal blockage needing surgery. Never give or bin-leave a cob. |
| Cheese | 🟡 Amber | Fine for most dogs in small amounts, useful for training and pills. High in fat and salt; many dogs are somewhat lactose intolerant. Avoid blue cheese entirely — roquefortine C is toxic to dogs. |
| Bread | 🟡 Amber | Plain baked bread is harmless but nutritionally pointless. Raw dough is an emergency — it rises in the stomach and ferments into alcohol. |
| Milk and dairy | 🟡 Amber | Not toxic, but most adult dogs lack the lactase to digest it well — the usual result is loose stools rather than danger. Water is the only drink a dog needs. |
| Chocolate | 🔴 Toxic | Theobromine. Risk rises with cocoa content — dark and cooking chocolate are far worse than milk. Call your vet with your dog’s weight and the wrapper. Full guide → |
| Grapes, raisins, sultanas, currants | 🔴 Toxic | Can cause kidney failure, and the toxic dose is unpredictable — some dogs react to very little. Includes mince pies and Christmas cake. Full guide → |
| Xylitol / birch sugar | 🔴 Toxic | Causes a dangerous blood-sugar crash and liver damage. Hidden in sugar-free gum, some peanut butters, mints and baked goods — always check the label before sharing peanut butter. |
| Onions, garlic, leeks, chives | 🔴 Toxic | Damage red blood cells; cooked, raw and powdered all count. The usual route is leftovers — gravy, stuffing, curry, stock. |
| Mushrooms | 🔴 Caution | Shop-bought plain ones are fine; wild mushrooms on UK walks are the real risk and identification is unreliable. Full guide → |
| Tomatoes | 🟡 Amber | Ripe fruit is fine in small amounts; green parts, stems and leaves contain solanine. Relevant if you grow them. Full guide → |
| Macadamia nuts | 🔴 Toxic | Cause weakness, tremors and hyperthermia. Most other nuts are a choking or fat problem rather than a poison — but macadamias are specifically toxic. |
| Cooked bones | 🔴 Avoid | Splinter and perforate. The post-roast bone is one of the most common avoidable emergencies. |
Two foods have their own pages because the questions around them are bigger than a table row: peanut butter (because of the xylitol labelling issue) and watermelon (because of the seeds and rind).
The Part Most Guides Skip: What to Do in the UK
If your dog has eaten something on the red list, the sequence matters more than the food:
- Phone your vet immediately — before symptoms appear. With most toxins, treatment is far more effective early, and waiting to “see if they’re okay” removes the best options.
- Have three facts ready: your dog’s weight, roughly how much was eaten, and when. Keep the packaging — cocoa percentage or an ingredients list changes the advice.
- Do not induce vomiting yourself. Home remedies (salt water in particular) can cause serious harm, and for some substances vomiting makes things worse. Only do it if a vet instructs you.
- Out of hours: your practice’s answerphone will name the emergency provider covering your area. If you cannot reach anyone, the UK has a dedicated service — Animal PoisonLine, run by the Veterinary Poisons Information Service, for owners rather than vets. Unlike the free hotlines American guides recommend, it is a paid service (a per-call fee), which is worth knowing before you’re in a panic at 2am.
On cost: a poisoning workup — consultation, decontamination, bloods, fluids, overnight monitoring — routinely runs into several hundred pounds, and grape or antifreeze cases needing extended hospitalisation can pass £1,000. This is precisely the scenario pet insurance exists for; our UK pet insurance guide covers what a policy does and doesn’t pay for.
How Much Is Too Much? The 10% Rule
Almost every “is X safe” answer is really about proportion. Complete dog food is formulated to be nutritionally balanced; anything else dilutes that balance. The working guideline used in practice is that treats and human food should stay under roughly 10% of daily calories. For a 10kg dog that is a genuinely small amount — a couple of carrot sticks and a few blueberries, not a slice of cheese and half a banana.
Two practical consequences. Rich or fatty additions matter more than owners expect: a large fatty treat can trigger pancreatitis, and the classic UK peak for that is the week after Christmas. And weight gain is the slower harm — the extras that seem trivial are exactly how a dog becomes overweight. Our guide to feeding routines covers portioning, and choosing a complete food covers the 90% that actually matters.
Dogs Eating Things That Aren’t Food
Two related questions come up constantly. Grass is the common one, and usually harmless — the reasons and the warning signs are in our guide to why dogs eat grass. Sudden changes in what or how much your dog consumes are the ones to take seriously: a dog that starts drinking noticeably more may be showing an early sign of kidney disease, diabetes or Cushing’s, and that is a vet appointment rather than a diet question.
This guide is general information and not a substitute for veterinary advice — if you are worried about something your dog has eaten, contact your vet. As an affiliate, we may earn a commission from some links, at no extra cost to you.
What Can Dogs Eat FAQs
What human foods can dogs eat safely?
Plain cooked meat and fish, plain cooked rice and pasta, and most fruit and vegetables — apples (without pips), bananas, blueberries, strawberries, carrots, cucumber, green beans and pumpkin are all fine in sensible amounts. The rule that matters is proportion: keep everything outside their complete food under about 10% of daily calories, and add nothing with salt, butter, onion or seasoning.
What is the most dangerous food for dogs?
Grapes and their dried forms are arguably the worst, because the toxic dose is unpredictable — some dogs develop kidney failure after a very small quantity, so there is no “safe” amount to reason with. Xylitol (birch sugar) is comparably serious and more easily missed, because it hides in sugar-free products including some peanut butters. Chocolate causes the most emergency calls simply because it is the most available.
My dog just ate something toxic — what should I do?
Call your vet straight away, before any symptoms appear, with your dog’s weight, an estimate of how much was eaten and when, plus the packaging if you have it. Do not try to make your dog sick unless a vet tells you to — home methods can cause additional harm. Out of hours, your practice’s recorded message will name the emergency service covering your area.
Can dogs eat cheese and dairy?
Most dogs tolerate small amounts of cheese, which makes it useful for training and hiding medication, but it is high in fat and salt and many adult dogs digest lactose poorly — the typical result of too much is loose stools. Blue cheese should be avoided entirely, as roquefortine C is toxic to dogs. Milk isn’t dangerous, but water is the only drink a dog actually needs.