What are the symtoms of a cat that ate rancid food? and should I be worried?

The only way to tell for sure is to either see the cat eat the food or find remnants of the food ---the most obvious signs are vomiting and diarrhea ---depending on the type of food and how long it has been sitting botulism can also be a problem in which you will see neurological problems .

In theory, the CAT would know this and not eat it. Carnivores are supposed to know when to leave it alone.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.