Originally Answered: Raw Food vs Canned Food vs Dry Food, what's the best for Cats?
To start out with, dry cat food was created for human convenience, and is the worst choice for your cat. Cats have a low thirst drive, being desert animals, and will often get dehydrated or have kidney problems if kept on an exclusively dry diet. It can cause blockages and UTIs quite frequently. Adding water to dry food speeds the growth of bacteria and can make a cat sick. Personally, I stay away from dry food unless I have no other choice (ie going out of town for a day or two). If you must feed dry food, stick to a grain/filler free food like Wellness, Innova, etc. Also, don't believe rumors about dry being "good for their teeth". A cats teeth are designed to rip and tear, not chew. The dry food also breaks up in their mouth too quickly, and doesn't stay on the teeth long enough to have any effect whatsoever.
Canned food is the most common choice for most cat households. Cats like it, it gives them the necessary moisture that they otherwise wouldn't get, and its typically low in fillers. A good wet food will be a great choice for your cat, as most families don't have the time, patience, or cash flow to be able to feed a raw diet. Look for a canned food that has meat as the first few ingredients, and no corn, wheat, or soy. Also, no by-products, or "animal digest" type ingredients.
The key to a raw diet is "balance". Raw is actually the best and most healthy choice for your cat, but if you don't order the food, and decide to make it yourself, you MUST do your research. A cat needs a balance of meat, bone, organ, and blood to get all the nutrients that they would get from a regular food. Can you remember the last time you saw a lion starting up a fire to cook its gazelle? Or the last time your cat tossed its freshly killed bird on a george forman grill? Me neither ;) Its natural for a cat to eat raw, but again, its not for everyone.
Personally, I feed my cats an exclusively canned diet (Merrick's, Innova, and Blue Buffalo) and supplement it with raw chicken a few times a week. Both of my cats are healthy, happy, and because of their healthy diet, they barely shed, and are as playful and content as they have ever been. I hope this clears some stuff up. I would be VERY wary of a vet who is not a fan of a raw diet, its not for everyone like I said, but its still the healthiest choice out there.
Edit: Just wanted to add, back when I used to feed dry food, one of my cats had chronic urinary tract infections. Since switching to canned/raw, I have had not a single solitary problem. My vet recommended the diet I am on now, and its a life saver for me.