Have a look at my thread in the nutrition section on whats in your cats food. I have researched this as my cat i adopted was on royal canin, iams and felix, not good!!
What you should look at is
no corn no gluten no soya no beet no garlic no onion no wheat no dairy.
YOU MUST HAVE TAURINE in there whether it is added or natural. If there is a high natural chicken content including offal you will probably have enough occurance naturally.
Its good you are researching this, shows you are a responsible owner
