There are certain foods that you should not feed your dog under any occasion. While individual cases will vary based on breed, weight, and other factors — in general this list of foods dogs can’t eat applies to all dogs. This is not a complete list, so feel free to add to it!
Alcohol - Can cause intoxication, seizures, low blood sugar, arrhythmias, coma, and death.
Avocado - The leaves, seeds, fruit, and bark contain person, which can cause vomiting and diarrhoea.
Bones from fish, poultry, and other meat - Can cause obstruction or laceration of the digestive system.
Cat food - Too high in protein and fats.
Chocolate, coffee, tea, and other caffeine - Contain caffeine, theobromine, or theophylline, which can cause vomiting and diarrhoea and be toxic to the heart and nervous systems.
Citrus oil extracts - Can cause vomiting.
Fat trimmings - Can cause pancreatitis.
Fish (raw, canned or cooked) - If fed exclusively or in high amounts can result in a thiamine (a B vitamin) deficiency leading to loss of appetite, seizures, and in severe cases, death
Grapes, raisins and currants - Contains toxins, which can damage the kidneys.
Human vitamin supplements containing iron - Can damage the lining of the digestive system and be toxic to the other organs including the liver and kidneys
Macadamia nuts - Contains toxins, which can affect the digestive and nervous systems and muscle. Can also cause obstructions.
Marijuana - Can depress the nervous system, cause vomiting, and changes in the heart rate.
Milk and dairy - Can cause diarrhoea
Mushrooms - Can contain toxins, which may affect multiple systems in the body, cause shock, and result in death.
Onions and garlic (raw, cooked, or powder) - Contain sulfoxides and disulphides, which can damage red blood cells and cause anemia.
Seeds from peaches and plums - Can cause obstruction.
Raw eggs - Contain an enzyme called avidin, which decreases the absorption of biotin (a B vitamin). This can lead to skin and hair coat problems as well as neurologic abnormalities. Raw eggs may also contain Salmonella.
Raw meat - May contain bacteria such as Salmonella and E. coli, which can cause vomiting and diarrhoea.
Salt - If eaten in large quantities it may lead to electrolyte imbalances, seizures, and death.
Sugary foods - Can lead to obesity, dental problems, and possibly diabetes mellitus.
Tobacco - Contains nicotine, which affects the digestive and nervous systems. Can result in rapid heart beat, collapse, coma, and death.
Yeast dough - Can expand and produce gas in the digestive system, causing pain and possible rupture of the stomach or intestines.
Xylitol (artificial sweetener) - Can cause very low blood sugar (hypoglycaemia), which can result in vomiting, weakness and collapse. In high doses can cause liver failure and death.