Photo of Beagle puppy by Emily Hoyer
Dog metabolism is different from that of humans and other animals, and certain types of food that are fine for people should never be given to dogs because of a risk of digestive upsets, sever illnesses, and even death.
Below you can find a list of foods that under no circumstances should be given to dogs. This list consists of the most common foods that can be found in your house because it is obviously impossible to list every single product that should be avoided.


Reasons to avoid

Alcoholic beveragesCan cause intoxication, coma, and death.
AvocadoContains persin, a substance harmless for humans who aren't allergic but toxic to dogs in large amounts. The leaves, seed, bark, and the fruit flesh all contain persin.
Baby foodCan contain onion powder (see onion below.) Can cause nutritional deficiencies if fed in large amounts.
Baking powder and baking sodaHighly toxic. Keep these food items high enough to be out of your dog's reach and keep pantry doors closed to protect your dog from serious food-related illness.
Cat foodCat food is too high in protein and fats.
Chocolate, coffee, tea, and other caffeine containing foodsCaffeine, theobromine, and theophylline in these products can be toxic to dogs affecting the heart and nervous systems.
Citrus oil extractsCan cause vomiting.
Eggs (raw)Contain an enzyme called avidin, which decreases the absorption of biotin. This can lead to skin and hair coat problems. Raw eggs may also contain Salmonella.
Fat trimmingsCan cause pancreatitis.
Fish (raw)
Can result in a thiamine deficiency leading to loss of appetite, seizures, and, in severe cases, death. More common if raw fish is fed regularly.
Grapes and raisinsCan damage the kidneys.
HopsCan cause panting, increased heart rate, elevated temperature, seizures, and death.
Human vitamin supplements containing ironCan damage the digestive system and be toxic to the other organs including the liver and kidneys.
Liver in large amountsCan cause Vitamin A toxicity, which affects muscles and bones.
Macadamia nutsCan affect the digestive and nervous systems and muscle.
MarijuanaCan depress the nervous system, cause vomiting, and changes in the heart rate.
Cow milk and other dairy productsSome adult dogs and cats do not have sufficient amounts of the enzyme lactase, which breaks down the lactose in milk. This can result in diarrhea. Lactose-free milk products are available for pets.
Moldy or spoiled food, garbageCan contain multiple toxins and cause vomiting, diarrhea, and affect other organs.
MushroomsCan affect multiple systems in the body, cause shock, and result in death.
Onions and garlic (raw, cooked, or powder)Contain sulfoxides and disulfides, which can damage red blood cells and cause anemia. Cats are more susceptible than dogs. Garlic is less toxic than onions.
PersimmonsSeeds can cause intestinal obstruction and enteritis.
Pits from peaches and plumsCan cause obstruction of the digestive tract.
Potato, rhubarb, and tomato leaves; potato and tomato stemsContain oxalates, which can affect the digestive, nervous, and urinary systems. This is more of a problem in livestock.
SaltIf eaten in large quantities, it may lead to electrolyte imbalances.
StringCan become trapped in the digestive system; called a "string foreign body."
SpicesHighly toxic. Keep all spices high enough to be out of your dog's reach and keep pantry doors closed to protect your dog from serious food-related illness.
Sugary foodsCan lead to obesity, dental problems, and possibly diabetes mellitus.
Table scraps Table scraps are not nutritionally balanced. They should never be more than 10% of the diet.
TobaccoContains nicotine, which affects the digestive and nervous systems. Can result in rapid heart beat, collapse, coma, and death.
Yeast doughCan expand and produce gas in the digestive system, causing pain and possible rupture of the stomach or intestines.
Your medicineReaction to a drug commonly prescribed for humans is the most common cause of poisoning in dogs. Just as you would do for your children, keep all medicines out of your dog's reach. Never give your dog any over-the-counter medicine unless told to do so by your vet. Ingredients such as acetaminophen or ibuprofen are common in pain relievers and cold medicine, but they can be deadly for your dog.

Read also: Top 5 toxic foods for cats and dogs