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 Contain an unknown toxin, which can affect the digestive and nervous systems and muscle.
Marijuana Can depress the nervous system, cause vomiting, and changes in the heart rate.
Milk and other dairy products Some adult dogs and cats may develop diarrhea if given large amounts of dairy products.
Moldy or spoiled food, garbage Can contain multiple toxins causing vomiting and diarrhea and can also affect other organs.
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 disulfides, which can damage red blood cells and cause anaemia Cats are more susceptible than dogs. Garlic is less toxic than onions.
Persimmons Seeds can cause intestinal obstruction and enteritis.
Pits from peaches and plums Can cause obstruction of the digestive tract.
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. Raw eggs may also contain Salmonella.
Raw meat May contain bacteria such as Salmonella and E. coli, which can cause vomiting and diarrhea. (If you are considering a raw diet for your companion, you should educate yourself thoroughly regarding the safe handling and preparation of raw ingredients, and the proper balance of nutrients required to maintain your companion’s health.)
Rhubarb leaves Contain oxalates, which can affect the digestive, nervous, and urinary systems.
Salt If eaten in large quantities it may lead to electrolyte imbalances.
String Can become trapped in the digestive system; called a “string foreign body.”