I feed both wet and dry. She gets a 3oz can wet chunks (she will not touch pate types) split into am/pm and then about 1/4 cup grain free dry cat food daily. She is super shiny! We joke about her "cat belly flap", but she's a good weight and only gained one ounce between 2011 and her 2012 yearly shots. She will be 3 y/o in April.
I feed wet for the moisture content. I feed the dry for ease if I have to go out of town and can't get someone to come over everyday (then she gets a whole can put out on the days they do come to feed/clean box).
I have 6. They all get free choice dry and a small amount of wet twice a day. I have three bowls of water throughout the house and it seems to help with the amount they drink. No problems. No one is overweight or unhealthy.
We also have water bowls everywhere for the cats. They have 1 dedicated to them on the kitchen counter so the dogs can't empty it or slobber water all over the hardwood floors. But there are 2 in our bathroom (one is really the dogs', but the cats drink from it too, the other is a "proper" kitty bowl LOL), and there are 2 bowls in the downstairs bathroom that are technically the dogs' as well, but the cats stroll through for a drink.
I DO think having it always around and in many places helps a lot, as they can drink on a whim instead of deciding if they're really thirsty enough to walk all the way to the other end of the house for a drink
______________________________ The CoTH CYA - please consult w/your veterinarian under any and all circumstances. - ET