Is your dog a canine trashcan? Is no plate of food or box of pizza sacred? If so, you are going to have a hard time persuading your pooch that your food is off-limits. However, there are some human foods that are tasty for dogs, but potentially lethal if ingested.

Some dogs will literally eat anything. From a pair of socks to your stash of hash. Unfortunately, while cannabis supplements for dogs are perfectly safe and great if your dog has anxiety or joint problems, feeding your dog hash brownies could kill him. No matter how greedy your dog is, you need to be very careful what he eats. Dogs benefit greatly from eating dog food, not human food. Dog food, especially top quality branded products, is perfectly balanced to meet a dog’s nutritional needs. Dogs that eat too much human food often end up obese and sick. Think about this if you want to avoid costly vet’s bills.

Here are five foods that dogs must never eat, even in small quantities.

Chocolate

Who doesn’t like chocolate? We all do, and so does your dog. Chocolate is sweet, creamy, and oh-so-addictive. It’s also hard to avoid around Easter and Christmas, but if you leave chocolate lying around and your dog snaffles it, he may become violently ill very quickly.

Chocolate contains theobromine, which is toxic to dogs. If ingested, it causes vomiting, diarrhea, seizures, and death. If you find an empty chocolate wrapper and your dog looks guilty, take him to the vet immediately.

Garlic

Not many pet owners know that garlic is potentially lethal to dogs. If your dog scoffs a piece of garlic bread it might not do him much harm, but if he develops a fixation for garlic bread, it will cause anemia and, eventually, death. Since onions are in the same family as garlic, they have much the same effect, so keep your onion bhajis to yourself.

Dairy

A large number of dogs are lactose intolerant, so eating dairy foods gives them diarrhea and gastrointestinal problems. Cheese and cow’s milk are also high in fat, which dogs also struggle to metabolize. If you insist on giving your dog cheese, cow’s milk, and toast with a generous swipe of butter, it could give him pancreatitis. Don’t let him eat your Ben & Jerry’s either!

Candy, Cakes, and Cookies

Sugar is bad for a dog, but many sweet treats contain an artificial sweetener called xylitol, which will give your dog a dangerous insulin surge when he ingests it. Sweet treats containing xylitol cause vomiting, seizures, and death, so don’t let your dog eat candy and sweets.

Avocado

Avocado on toast is super trendy, but whilst it’s great for Millennials, it isn’t so great for Millennials’ dogs. Avocado stones are a major choking hazard, but the flesh is also toxic to dogs because it contains persin. Don’t let your pooch anywhere near your avocado or he could die.

Other dangerous foods include caffeine, alcohol, grapes, macadamia nuts, yeast dough, and corn on the cob.