The first thing that I would do is to have the vet check your cat. She could have teeth or mouth problems, and I have seen cats younger than five years old have dental/mouth problems. She’s obviously hungry, since she scarfs up the wet food, but she may not be able to chew the dry food without pain. I disagree that cats will eat anything, if they are hungry enough. That is likely true with dogs, but some cats will starve rather than eat something they don’t want. Besides, it sound like your cat can’t eat dry food right now.
I agree with DandyDear that the quality of cat food does make a difference. Skip all the grocery store brands. They pretty much all have corn gluten and way too much other grains, which cats don’t need, and which can make them overweight. The protein sources are of low quality, and there are worthless fillers, like beet pulp. Start reading labels—the first five ingredients on the label make up the bulk of the food. No corn or wheat gluten, no “by-products” (which is all the gross stuff left over after the animal is butchered for human food, and can include “downer” and sick animals, entrails, and even tumors, yuk!) The healthiest foods for pets can usually be found at independent pet stores, and at health food stores like Wild Oats. Wellness is an excellent food. Other good brands include Solid Gold, Feladae, Innova and Innova Evo, California Natural, Eagle Pack Holistic, Paul Nerman’s. There are others, but that’s all I can come up with off the top of my head. :) Pet foods that are labeled “organic” and/or “human-grade” are usually the highest-quality. Watch out for the word “natural” on the label, because anyone can put that on pet food without meeting any criteria whatsoever. “Natural” is showing up on many grocery-store brands now, as the pet-food industry tries to cash in on the “green” movement. There are standards set for “organic” and “human-grade” food.
As to the wet vs. dry deal, I personally feed canned food twice a day, and leave out dry food for free feeding. My cats get filtered (Pur) tap water, too.
High-quality food will cost more, but it has high-quality protein sources, and little or no fillers. And the “garbage in, garbage out” saying really applies here. Cats who eat a high-quality food need less food to feel full, and their litterbox “output” will also be less, as they are able to make use of much more of the food than they can when fed grocery store brands. So better food equals less scooping, which I’m certainly in favor of! :)
All of this also applies to dog foods as well.
OK, off the soapbox for now. I hope this helps you, Supergirl.
Katherine