Most Cats Love Tunafish!
And that is why it is so dangerous. If you consistently feed your cat a diet of Tunafish it may decide that it will ONLY eat Tunafish. Once a cat becomes “fussy” with what it eats it is very hard to get it to return to a balanced diet, and a balanced diet is essential to your cats health.
Over eating Tunafish can cause steatitis in your cat. This condition destroys vitamin E because of the excess of fatty acids in a Tunafish rich diet. It will make your cat sick and could potentially be fatal over time.
The best idea is to keep Tunafish as a special treat for your cat, feeding it only occasionally and in small amounts. Also, where possible feed only Tunafish that has been packed in water, not in oil.