Raw Food Diet For Pets

I think that most of the actual pet food is also processed with meats that have been given hormone supplements to make the animal grow faster and put on weight, just like the meat products that are in the store for human consumption. the only way that you will not get meat that has additives is to buy it from a farmer, or buy organic meat that specifies that it is grassfed, and free from hormones or antibiotics that are usually used in livestock.
Even when meat comes from a farmer, if they use commercial livestock feed, it often has additives. If your vet said just to use regular meats, but feed the cat only raw food, then it seems like you are doing the best thing right now, unless the cat can catch wild mice or birds to eat.