1. Chocolate & anything with caffeine especially dark chocolate contains theobromine which is similar to caffeine.  This is a very dangerous substance to dogs.  If you know that your dog has eaten chocolate take it to the vet immediately.  If your dog eats a very small amount of chocolate, usually it only causes digestive issues.
  2. Onions & Garlic contain sulfoxides and disulfides which damage red blood cells and cause anemia.  Onions being the most toxic of the two, however garlic should be avoided as well.
  3. Grapes and Raisins have a toxin that effects dogs kidney function and causes kidney damage and can lead to kidney failure.
  4. Macadamia & Other nuts contain toxins that effect the digestive system, nervous system, and muscles.
  5. Mushrooms effect many areas of a dogs body.  They can cause shock and even possibly death.
  6. Large Quantities of Liver results in Vitamin A toxisity and effects muscles and bones of the animal.
  7. Human Vitamins Containing Iron damage dogs digestive system wall lining, kidneys, and liver.  Be sure to use a vitamin supplement designed for dogs.
  8. Milk & Other Dairy Products have lactose and many dogs don’t have enough lactose enzymes to effectively break it down.  This effects the dogs digestive system and leads to diarrhea.
  9. Raw Eggs contain an enzyme known as avidin which restricts the absorption of biotin, one of the many B Vitamins.  This can lead to an unhealthy coat and skin problems.  Also eggs can carry salmonella which is poisonous to dogs.
  10. Most People Food should be avoided at all times.  Many people foods have far to many fats, sugars, and salt.  Salt causes electrolite imballances in dogs.  Sugars are not a natural food and causes obesity, and large amounts of fat and protein can’t be digested correctly and causes digestion problems, pancreatitis, as well as liver disfunction.  If you want to feed people food to your dog, check out this list of People Foods that are good for your pooch!