Diets and Pets how not to screw up

There are a lot of people out there that would disagree with what I am going to write here, thats ok everyone has the right to their own opinion, but these are things that i have heard from animal vets and such. This is not written out science or anything like that, just in my words.

Cats and Dogs are carniveuras animals, they eat meat, that is in their DNA, something that they do, their parents and everyone behind them have done. It is in their nature to eat it and so on, I will never approve a vegetarian or vegan diet for animals ever. They are meat eaters, and that is how they will always stay and be, end of story.