When feeding an indoor cat, we should try to re-create the whole prey our cat would be eating in the wild.
There are many things that go into keeping your cat healthy and happy. Genetics and environment play a part. But, there is one thing that has a huge effect on your cat's health, and that is diet. Cats are predators that evolved to eat a diet of raw meat. It is only over the past 70 years or so that the pet food industry have tried to feed cats a diet based on foods unsuitable for a strict carnivore. Grains, vegetable and plant matter and highly processed and cooked meat products. It's no wonder cats suffer from so many diet-related diseases.
Congratulations on taking the first step toward feeding your cat a healthier diet. Just making the decision to change to raw cat food can be the hardest part. For many people, realizing your obligate carnivore should be fed a diet closer to what it evolved to eat is a complete shift in thinking about cat nutrition. It's empowering to take control of what goes into your cat. It's also a bit of a relief. No more mystery ingredients. No more worrying about what "by-products" really means. You now get to skip an entire aisle at the super market.
It is important to remove dry food from your cat's diet. This one change alone is a big step forward in improving cat nutrition and health. Dry food, be it premium, prescription or "natural," harms your cat's health. It consists mostly of starch and carbohydrates – it must be, as it can't be manufactured and extruded otherwise. The quality of the ingredients really doesn't matter – that's not the point. Simply that it is carb-laden and dry is enough to make it a terrible choice for cats. The carbs take the place of healthy meat-derived protein and fats that are vital for an obligate carnivore. All of these factors make dry foods detrimental to your cats health.