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@imastawka wrote:

Bright is right.    Cat food contains Taurine, which is essential for cats.

 

Taurine is an essential amino acid that is critical for normal heart muscle function, vision, and reproduction in kittens. ... IAMS wet cat foods are supplemented with taurine because they must contain as much as twice the amount of taurine found in dry food for cats to maintain adequate blood taurine levels.

 

“After six weeks without taurine the symptoms become noticeable, but total irreversible blindness occurs only after a long-term deficiency. When the taurine takes its leave the retinas degenerate and eventually the cat will go blind

 

 

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reading the specs I think I shall purchase some ... meow ! 

https://www.webmd.com/vitamins/ai/ingredientmono-1024/taurine