Wet food is preferable for cats as they were originally desert animals and derive their moisture.from food. They may drink.but typically will not compensate for.the.lack of moisture in dry food like dogs do. Plus dry food contains starches which cats are not naturally built to digest.
Kibble was created for our convenience only. It is cheaper to feed and you can leave it out but in the end, canned food is optimal.
There is much debate on this, as many people feed a dry food only diet or a 50/50 mix and their cats are.doing fine. A 50/50 mix is better than no canned at all. If you choose to go all wet, please remember that since canned food is 70% moisture, you'll need to feed more. I feed my one cat, who is 4.5 kg,(don't know the conversion to pounds) and he gets1.5 cans (5.5 oz cans) per day. It adds up to a pretty penny but.in the end it's well worth it. My cat has Chronic Real Failure so that is why he is on an all wet diet; but I didn't 'raise' him or else he would have been on it always. So who knows, maybe he would have gotten kidney failure anyways? There are surprisingly a lot of vets and vet personnel who feed an all dry diet. And from what I have been reading, the vets (not referring to the personnel.because I don't read their message boards), it's because they can just plop the dish down and not worry about it. Vets aren't trained well on nutrition, just mainly on the way the body.processes nutrients and its relation to disease and of course, the rx brands of food and their corresponding research. And some kitties love their dry food! I know mine would eat dry food until they were as fat as Garfield!!
It's not just moisture that is part of the debate between dry and wet. Obesity is a factor when feeding a dry food. Not to say a cat can't get fat on wet food bit dry food has more carbs which cats are not.designed.to eat (they can process some) and so this contributes to obesity and possibly diabetes. In male cats, an all dry diet may sometimes lead to urinary blockage (again, referring to moisture content).
This is my opinion but the other.posters gave you good websites to ponder.