The smell of the barbecue grill is like an invitation to your dog. But that chicken bone you are about to hand over could be tearing through its insides.

Barbecue season is here. Grills are firing up in gardens across the UK. The smell of hot dogs, burgers, and chicken wings is everywhere. Your dog is sitting at your feet, looking up at you with those eyes. And you feel your resolve weakening.

Search data shows that "what foods are toxic to dogs" has spiked across the UK in recent weeks. Dog owners are worried. What you need is not more anxiety — you need a clear, practical list.

Here are 7 foods you must never feed your dog this summer, and why.

Part 1: 7 Foods to Never Feed Your Dog

1、 Onions and Garlic (The Allium Family)

You might think "just a small piece of onion won't hurt." But veterinary nutritionists are clear: onions are toxic to dogs, even in small amounts.

Onions, garlic, leeks, and chives all belong to the Allium family. They contain compounds called organic sulfides, which damage a dog's red blood cells and cause oxidative haemolytic anaemia.

Summer BBQ traps: Onion bits in burger patties, fried onion rings on hot dogs, garlic powder in marinades, raw onions in salads — all of these can put your dog at risk.

Symptoms: Vomiting, diarrhoea, weakness, rapid breathing, pale gums. Symptoms may not appear until a few days after ingestion.

2、 Grapes and Raisins

This is not "a little bit won't hurt." Grapes and raisins are highly toxic to dogs and can cause acute kidney failure.

The exact toxic mechanism is still not fully understood. Some dogs eat them and show no symptoms. Others go into kidney failure after just a few grapes. You cannot predict which category your dog falls into. That is why the scientific consensus is simple: complete avoidance.

Summer BBQ traps: Fruit salads with grapes, cakes with raisins, raisin bread, sauces containing grape juice — even raisin cereal left on the table.

Symptoms: Vomiting, lethargy, loss of appetite, reduced urination. Kidney failure can be irreversible.

3、 Cooked Chicken Bones

This is the most common trap at summer barbecues.

Chicken meat itself is safe for dogs. But cooked chicken bones are extremely dangerous. Cooking makes bones brittle. They shatter into sharp fragments that can puncture the oesophagus, stomach, or intestines, causing internal bleeding and even death.

"My dog ate bones when I was a kid and was fine" — that was luck. Every summer, vets treat cases of intestinal perforation caused by cooked chicken bone fragments.

Safe practice: If you want your dog to share the barbecue, prepare boneless, unseasoned chicken pieces in advance. Do not tear a piece off the chicken leg you are eating — you may not see the bone fragments hidden inside.

4、Avocado

Avocado is a star on the barbecue table. But its pit, skin, and leaves contain a toxin called persin, which is toxic to dogs.

The flesh of the avocado contains lower levels of persin and small amounts may not cause immediate severe problems. But the pit is a separate danger — it can cause choking or intestinal blockage. Tolerance to avocado also varies significantly between individual dogs.

Recommendation: Keep the whole avocado, pit and all, out of your dog's reach.

5、Ice Cream and Artificial Sweeteners (Xylitol)

Eating ice cream in summer is normal. But that cone in your hand could be toxic to your dog.

The problem is not the milk (though many dogs are lactose intolerant and will get diarrhoea). The problem is xylitol — an artificial sweetener commonly found in sugar-free ice cream, sugar-free gum, sweets, and even some peanut butters.

Xylitol is highly toxic to dogs. It causes a massive release of insulin, leading to a dangerous drop in blood sugar. In severe cases, it can cause liver failure and death.

Safe practice: If you want to give your dog ice cream, buy dog-friendly ice cream made specifically for them. Not the one in your hand.

6、 Raw Potatoes

Baked potatoes are a barbecue staple. But raw potatoes contain solanine, which is toxic to dogs.

Cooked potatoes (without salt or seasoning) are safe. But never let your dog near raw potatoes or potato skins.

Summer BBQ traps: Peeled raw potato skins, chopped raw potato pieces — your dog may sneak them when you are not looking.

7、Alcohol

Alcohol is far more toxic to dogs than to humans. Even small amounts can cause alcohol poisoning, coma, and death.

Summer BBQ traps: Half-empty beer glasses left on the ground, spilt wine, meat marinated in alcohol-based sauces (alcohol does not fully cook off).

Safe practice: Keep all alcoholic drinks well out of your dog's reach.

Part 2: Summer Treats — 5 Safe Foods You Can Give Your Dog

Now you know what not to feed. But it is equally important to know what you can feed.

Dogs typically eat 10-20% less in summer. This is not a time to let them eat less and miss out on nutrition. It is a time to make every bite count. Here are 5 types of food that are safe, healthy, and perfect for summer.

Summer Treat 1: Hydrating Fruits (90%+ Water Content)

Watermelon is the number one summer choice. It is 92% water. Remove the seeds and rind, cut into small pieces. It contains natural sugar, so give in moderation.

Cucumber is 95% water and almost zero calories. Slice and serve raw. Like a natural ice lolly for dogs.

Cantaloupe is rich in beta-carotene and water. Remove seeds and rind. It has more sugar than watermelon, so keep portions small.

Strawberries are packed with vitamin C and fibre. Wash and chop into small pieces — especially important for small dogs.

Rule of thumb: Treats of all kinds should make up no more than 10% of your dog's daily calorie intake. When trying a new fruit, give a small piece first and monitor for 24 hours.

Summer Treat 2: Frozen Snacks — Dog-Friendly "Ice Cream"

Instead of giving your dog human ice cream (which contains sugar, lactose, and possibly xylitol), spend 5 minutes making your own:

1、Blueberry Banana Pops: Blend banana, blueberries, plain Greek yoghurt, and water. Pour into ice cube trays and freeze overnight.

2、Watermelon Ice Cubes: Blend seedless watermelon into juice. Pour into ice cube trays and freeze. The simplest cooling snack.

3、Cucumber Yoghurt Freeze: Mix grated cucumber, plain yoghurt, and a tiny drop of honey. Freeze.

4、Chicken Banana Bites: Mix cooked shredded chicken breast, mashed banana, and a little low-salt broth. Pour into moulds and freeze.

These homemade frozen treats are safe, help cool your dog down, and increase their fluid intake on hot days.

Summer Treat 3: Digestive-Friendly Vegetables

Carrots are rich in beta-carotene and chewing them raw helps clean teeth. Serve raw or frozen as a chew toy.

Green beans are low-calorie, high-fibre, and rich in iron and calcium. Serve raw or lightly steamed. Avoid canned green beans, which are high in salt.

Pumpkin is high in fibre and aids digestion. Serve cooked or use plain pumpkin puree.

Sweet potato is rich in vitamins A, B6, C, and fibre. Bake or steam, remove the skin, and serve without any seasoning.

Summer Treat 4: Appetite Boosters for Hot Days

If your dog's appetite drops noticeably in the heat, try these methods:

1、Warm water soak: Add warm water or low-salt broth to dry food to increase aroma and moisture.

2、Wet food swap: Temporarily switch to high-quality wet food. Remember to adjust calorie portions.

3、Plain white meat: Unseasoned, skinless chicken breast or white fish, chopped and mixed into regular food.

4、Pumpkin puree: Mix one to two tablespoons of plain pumpkin puree into food to add flavour and fibre.

Summer Treat 5: Electrolyte Replenishment

Dogs lose both water and electrolytes in hot weather. Do not give human sports drinks — they contain sugar and salt that are not suitable for dogs.

Safe alternatives:

1、Always provide fresh, cool boiled water (avoid bottled mineral water, as long-term use may increase the risk of urinary stones)

2、If your dog has sweated heavily or exercised, you can add a very small amount of natural coconut water to their drinking water

3、Feed water-rich fruits and vegetables as listed above

If Your Dog Eats Something Dangerous — What to Do

Step 1: Stay calm. But do not wait.

Step 2: Note down what your dog ate, when, and roughly how much.

Step 3: Call your vet immediately. Do not wait for symptoms to appear. Some toxins, like those in grapes, have a progressive effect — by the time symptoms show, it may already be too late.

Step 4: Do not induce vomiting unless your vet explicitly tells you to. Some substances, like sharp bone fragments, can cause more damage if brought back up.

Final Word

Your dog sitting at your feet while you barbecue is a warm picture. But the urge to "just give them a bite" could turn this summer into your most regretful one yet.

Onions, grapes, cooked chicken bones, xylitol — things that sound "harmless" can be deadly in a dog's body.

But this summer, you can also use watermelon, blueberries, cucumber, homemade frozen treats, and pumpkin puree to make your dog's diet richer, healthier, and more refreshing.

Remember one simple rule:

If you are not sure whether it is safe, do not give it.
If you know it is safe, it is a treat.

Your dog will not complain that you did not share. They will just sit at your feet, quietly waiting.

Do not let one barbecue become an emergency. Do not let one summer become a burden they have to carry.

References

1、China Daily. Summer dog feeding guidelines. 2024.

2、Birmingham Live. Dog owners urged to remove three items from kitchen. May 2025.

3、Bond Vet. What Foods Are & Are Not Safe for Your Pet. 2025.

4、YuMOVE. A-Z Of What Dogs Can & Can't Eat: Summer Edition. 2023.

5、The Mirror. Expert names toxic foods that dog owners should avoid this summer. July 2025.

6、Wales Online. Avoid 'three foods' warning to dog owners. May 2025.

7、Vetopia. Safe human foods for dogs. 2024.

8、ManyPets UK. Summer feeding guide for dogs. 2024.