Raw feeding has caught on in recent years. It's been largely credited by manufactures as "the natural diet" of domestic cats. Still, the benefits of raw feeding are anecdotal and don't get much support from the results of peer-reviewed researches.
"Therefore, aside from some plausible claims for better digestibility and stool quality, the various health claims made for raw feeding remain a mixture of anecdote and opinion, not backed by highly relevant data. This situation is reflected in critical reviews and in advice provided by professional bodies (Schlesinger & Joffe 2011, American Veterinary Medical Association 2012, Freeman et al. 2013, World Small Animal Veterinary Association 2015)."
R.H. Davies, J.R. Lawes, A.D. Wales. Raw diets for dogs and cats: a review, with particular reference to microbiological hazards J. Small Anim. Pract., 60 (2019), pp. 329-339
"If a commercial RMBD is formulated to meet AAFCO nutrient guidelines for a particular life stage (ie, growth-reproduction or adult maintenance) of a dog or cat, there should be minimal risk of nutritional inadequacy. However, few manufacturers of raw diets conduct AAFCO feeding trials or digestibility studies on finished products, and manufacturers differ with regard to their attention to quality-control procedures.
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In contrast, home-prepared RMBDs rely heavily on each particular recipe or feeding program as well as the pet owner's interpretation of and compliance with published recommendations, understanding of nutrient requirements for dogs and cats, and understanding of the nutritional value of individual ingredients. On the basis of published diet reviews, most home-prepared diets (both raw and cooked) are deficient in 1 or more essential fatty acids, vitamins, or minerals or a combination thereof. Although the perceived benefits of home-prepared diets may be reinforced daily to owners through a pet's appetite or coat quality, nutrient deficiencies and excesses in adult animals are insidious and can lead to long-term complications if not detected and corrected. In young growing animals and pregnant or lactating animals, nutrient deficiencies and excesses can cause severe and sometimes life-threatening complications."
Freeman LM, Chandler ML, Hamper BA, Weeth LP. Current knowledge about the risks and benefits of raw meat-based diets for dogs and cats J. Am. Vet. Med. Assoc., 243 (2013), pp. 1549-1558, 10.2460/javma.243.11.1549
If you're still determined to feed your cat raw and prepare it by yourself, the only way to do things properly is to consult with a board certified vet nutritionist.