Caffiene (Coffee, pop, tea, etc): Can affect the heart and nervous system.
Hops: Causes panting, increased heart rate, seizures, fever, and death.
Large amounts of liver: Can cause Vitamin A toxicity affecting the bones and muscles.
Yeast Dough: Expands and produces gas in the digestive system resulting in severe pain, and in some cases, rupture of the stomach or intestines.
Sugary Foods: Leads to obesity, dental problems, and diabetes.
Salt: Large quantities of salt can lead to electrolyte imbalances.
Peach and Plum Pit: Can cause digestive tract obstructions requiring surgery.
Onions and Garlic: Contain sulfoxides and disulfides that damage red blood cells resulting in anemia. Cats are more prone to problems then dogs.
Mushrooms: Stomach upset and even organ damage, depending on the species of mushroom.
Dairy Products: Most Cats, including kittens, are not capable of breaking down the lactose in milk, making them "lactose intolerant" resulting in diarrhea and abdominal pain.
Macadamia Nuts: An unknown toxin affects the nervous, digestive systems and muscles.
Green Tomatoes: Contain the poisonous alkaloid Glycoalkaloid (also found in Deadly Nightshade) that results in severe and painful gastrointestinal upset.
Chocolate: Contains Theobromine which is extremely toxic to cats and many other animals.
Raw Fish: Regular consumption of raw fish can result in thiamine deficiency resulting in loss of appetite, seizures, and in the most severe cases, death.
Tobacco: Nicotene affects the digestive and nervous systems and can result in rapid heart beat, followed by collapse, coma, and death. Cigarette smoke effects the lungs of animals just as it does humans, but much more quickly and more severely due to their size.
Grapes and Raisins: Deaths in parrots have been contributed to an unknown toxin in grapes, and can damage the kidneys of dogs and cats as well.
