Cats are such picky eaters that we may not think much about what they shouldnít be eating.

But there are a few common foods your cats should never eat. These come from Karl Jandrey, professor of small animal emergency care at the UC Davis School of Veterinary Medicine.

  • First: Tuna! Cats can actually be addicted to tuna. And while a little every now and then probably wonít hurt, a steady diet of tuna meant for human consumption can lead to malnutrition - because it wonít have all the nutrients a cat needs. Also, too much tuna can cause mercury poisoning, or lead to Yellow Fat Disease. This is an extremely painful and sometimes fatal disease that comes from a deficiency of Vitamin E. Itís the result of a diet thatís high in unsaturated fatty acid - and tunaís usually the culprit.
  • Next: Onions in all forms - powdered, raw, cooked or dehydrated - can break down a catís red blood cells, leading to anemia. And thatís true even for the onion powder thatís found in some baby foods. Onions can also cause gastrointestinal problems Ė the same goes for garlic and chives.
  • Something else thatís bad for cats: Alcohol! Just two teaspoons of whisky can cause a coma in a 5-pound cat, and one more teaspoon could kill it. And the higher the proof, the worse the damage.
  • And lastly: Caffeine in large enough quantities can be fatal for a cat - and thereís no antidote. In addition to tea and coffee, caffeine can be found in cocoa, chocolate, colas and energy drinks. So keep all of these away from your cats.