Dogs have a different metabolism compared to humans, and as a result, foods that are not harmful to humans can be potentially deadly or toxic to dogs. Here is a list of foods that should not be fed to your dog:
Alcoholic beverages - intoxication; can also cause coma and death if consumed in larger quantities
Avocado - toxic to cats and dogs; will trigger fluid accumulation in the lungs and chest, leading to
difficulty breathing and death due to oxygen deprivation; fluid
accumulation can also occur in the heart, pancreas and abdomen
Baby food - some baby foods contain onion powder which is toxic to dogs
Bones from fish, poultry, or any other meat sources - the sharp edges of the bones themselves can cause obstruction or laceration of the digestive system
Cat food - contains too much fats and protein for dogs' digestive systems
Chocolate, coffee, tea, and other caffeine - poisonous / toxic to dogs; contain caffeine, theobromine, or theophylline; affect the heart and the nervous system
Citrus oil extracts - can cause vomiting
Fat trimmings - possible to cause pancreatitis
Grapes and raisins - contain a toxin which can do damage to the kidneys
Hops - can cause panting, elevated temperature and heart rate; can result in seizures and death
Human vitamin supplements containing iron - can damage liver and kidneys and digestive lining
Large amounts of liver - can cause Vitamin A toxicity affecting muscles and bones
Macadamia nuts - contain a toxin which can affect the digestive and nervous system and muscles
Marijuana - affects the nervous system; can cause vomiting and affect heart rate
Milk and other dairy products - most dogs do not have sufficient amounts of the enzyme lactase, which breaks down
the lactose in milk - causing diarrhea; lactose-free milk
products are available for pets
Moldy or spoiled food, garbage - contain multiple toxins that can cause vomiting and diarrhea
Mushrooms - can contain toxins that can cause shock and result in death
Onions and garlic (raw, cooked, or powder) - damage red blood cells causing anemia - lack of oxygen and energy; garlic is less toxic than onions
Persimmons - can cause intestinal obstruction and inflammation of the small intestine
Pits from peaches and plums - can cause obstruction of the digestive tract
Potato, rhubarb, and tomato leaves; potato and tomato stems - contain toxins; can affect the digestive, nervous, and urinary systems
Raw eggs - decrease the absorption of biotin - Vitamin B; this can lead to skin and hair coat problems; may also contain Salmonella
Raw fish - can result in a thiamine (Vitamin B) deficiency leading to loss of appetite, seizures, and in some cases, death; more likely to occur if raw fish is fed regularly
Salt - if consumed in large quantities, can lead to electrolyte imbalance and result in damage to the kidneys
Sugary foods - lead to obesity and dental problems; can also cause diabetes
Table scraps - they should never be more than 10% of the diet; fat should be trimmed from meat; bones should not be fed; can contain ingredients that can cause allergies in dogs
Tobacco - contains nicotine which affects the nervous and digestive system; can cause increased heart rate, collapse, coma, and even death
Yeast dough - expands and produces gas in the digestive system - results in pain and possible rupture of the stomach or intestines