If you're looking to COOK your own food, then this thread is a great resource for recipes [thread="263751"][/thread]
When making your own cat food, its VITAL to stick rigidly to a balanced recipe - absolutely NO changes without talking to an expert. Luckily, there are a few of those here, so if you have any questions, just ask
You might not be able to get the listed pre-mixes where you live.
Raw food is another option and if you do frankenprey, you don't need any supplements but you DO need to follow the guideline of 80% meat, 10% bone, 5% organs, and 5% other secreting organs.