Wet vs Dry Cat Food (2026): Water, Calories, Teeth

Most cat owners end up splitting the diet between cans and kibble. The differences are water, urinary health, calories, teeth and cost, taken one at a time below, followed by how to feed both.

How we chose: we did not test any food; this guide is built from Cornell's Feline Health Center, Tufts' veterinary nutritionists, the FDA and the VOHC list, and the two example foods are sold by Amazon.com with AAFCO statements we read on Purina's and Hill's pages on September 28, 2026.

Wet vs dry at a glance

Prices are Amazon's, as of the time shown, and subject to change. Details

Start with the AAFCO statement, not the format

The FDA says a food labeled "complete and balanced" is "intended to be fed as a pet's sole diet," and must either meet an AAFCO nutrient profile or pass an AAFCO feeding trial. That rule is the same for a can and a bag.

In their post on canned or dry food, Tufts veterinary nutritionists say both "have to meet basically the same standards for nutrient levels, so both are going to provide adequate nutrients."

Check the life stage too. An adult maintenance food, such as the Hill's Oral Care here, is not for kittens; an all life stages food, such as the Fancy Feast pate, covers every age.

Cornell's Feline Health Center warns that some gourmet canned foods "may be nutritionally incomplete," so read the label on specialty cans and toppers; our wet cat food guide shows how to spot one labeled for supplemental feeding only.

Related: kitten food guide, senior cat food guide.

To compare protein or fat between a can and a bag, the FDA says you must first convert the guaranteed analysis to a dry-matter basis: subtract the moisture percentage from 100 to get dry matter, then divide the nutrient percentage by that figure and multiply by 100. Otherwise the water in wet food makes every number look smaller.

Water: the biggest difference

Cornell says dry food "contains between six and 10 percent water," while canned food has "a moisture content of at least 75 percent, making it a good dietary source of water." The FDA gives 75 to 78% for canned pet food and 10 to 12% for dry as typical. Purina's guaranteed analysis for the Fancy Feast pate allows up to 78% moisture.

Cats do not always drink to make up the gap. Tufts writes that cats "that eat only dry diets tend to not drink enough to compensate for the difference in water content between dry and canned diets."

Its tips for getting cats to drink more start with wet food ("a great source of water for cats"), then add water to wet food or soak kibble gradually, put water next to the food bowl, offer several bowls in different places, and try a filtered fountain cleaned "at least weekly or as directed by the product instructions." Our cat water fountain guide compares fountains and their cleaning schedules.

Urinary health

This is where wet food matters most. Tufts names two common conditions in cats "that may benefit from increased water consumption": lower urinary tract disease and kidney disease. Its water guide adds that more water "can sometimes help with many urinary conditions by flushing out the kidneys, the bladder, and the rest of the urinary tract."

Cornell's page on feline lower urinary tract disease says signs are most often seen in "middle-aged, over-weight cats that get little exercise, use an indoor litter box," and "drink less water."

It is cautious about marketing: diets sold for "urinary health" may reduce the chance that cats with idiopathic cystitis develop a blockage, "there is no evidence that they have reduced the incidence of feline LUTS themselves." Stone-dissolving diets are prescribed by a veterinarian.

A cat straining in the litter box and passing little or no urine may have a urethral obstruction, which Cornell calls "an absolute emergency, requiring immediate veterinary treatment." For any urinary or kidney problem, the diet is your vet's call, including whether to switch to wet or to a therapeutic food. Ask your vet; this page is general information, not veterinary advice (more on that).

Key point: if your cat has had a urinary problem, keep its diet consistent. Cornell says changes in food "can also result in recurrence" of idiopathic cystitis in some cats.

Calories and weight

Cornell calls obesity "the most common nutrition-related problem in cats," one that makes cats susceptible to arthritis and diabetes. Format can help. Tufts says canned foods "are also lower in calories per volume and the cans offer built-in portion control versus having a whole bag of dry food," and are often higher in protein and lower in carbohydrate than most dry diets.

Dry food is dense by comparison. Hill's lists 483 kcal per cup for its Science Diet Adult Chicken Recipe, and Purina lists 494 kcal per cup for Pro Plan Adult Complete Essentials Chicken & Rice. A few extra pieces a day add up.

The bigger risk with dry food is the full bowl. Cornell notes dry food "does not dry out" and so allows free-choice feeding, but Tufts' feeding-frequency guide says free-feeding "is not recommended unless all of your pets who can access the food have an ideal body condition score and can maintain it." Measured meals, or an automatic feeder that portions dry food, keep the amount in check.

Teeth: what dry food does and doesn't do

"Crunchy kibble cleans teeth" is a common claim, and mostly an unchecked one. In a post on dental foods and treats, Tufts explains that AAFCO lets foods claim to clean teeth "by abrasive or mechanical actions," which means "companies can make products without proof that they help." That refers to "the minor dental benefit that pets get just from chewing any dry treat or kibble."

The Veterinary Oral Health Council (VOHC) is the independent check. Its council of veterinary dentists and dental scientists reviews trial data and awards a seal for plaque, tartar or both; it "does not test products itself," per VOHC. On September 28, 2026, the dental diets for cats on its accepted products list were:

• Science Diet Oral Care for Cats (Hill's): plaque and tartar, consumer
• Royal Canin Feline Dental Diet: plaque, consumer
• Hill's Science Plan Vet Essentials Multi-Benefit + Dental Adult Cat Food: plaque and tartar, consumer
• Performatrin Prime Oral Care (Pet Valu Canada): plaque, consumer
• Prescription Diet Feline t/d (Hill's) and Purina Pro Plan Veterinary Diets DH Feline: plaque and tartar, veterinary only

Ordinary kibble is not on that list. VOHC still puts brushing ahead of any food or chew, and recommends periodic veterinary checks of the mouth and teeth. Our pet dental care guide covers brushes, pastes and VOHC-accepted treats.

Cost of feeding

Wet food costs more per day. Cornell calls dry cat food "relatively inexpensive" and canned food "generally the most expensive type," and Tufts explains why: "you are paying for a can that is 75-85% water."

Tufts adds that some newer canned foods run as high as 85% moisture, which makes them even more expensive to feed. A cup of kibble and a 3 oz can are not equal meals, so compare foods by the cost of a day's calories, not the cost of the package.

Feeding both

Most healthy cats can eat either, and many eat both. Tufts says "outside of cats with kidney disease or urinary tract disease, there is no good evidence that the type of diet makes a difference in overall health," and that you "can decide whether you want to feed all canned, a combination of canned and dry, or all dry food."

Cornell agrees: "Some cats like canned food, some like dry food, and some like a combination of the two."

It adds that feeding "two or three different cat foods provides flavor variety and may prevent your cat from developing an exclusive preference for a single food."

A few rules make mixed feeding work:

• Count the calories from both. Use each label's calorie statement, and cut the dry portion when you add a can.
• Handle wet food like food. Cornell says to refrigerate any unused portion of an opened can.
• Change slowly. Tufts' switching guide suggests offering a new food next to the old one for cats that dislike change, then reducing the old food "in 25% increments."
• Start young. Tufts says "many cats are unwilling to eat foods as adults that they are not offered as kittens," so offer kittens some canned food.

Recalls

Neither Purina Fancy Feast nor Hill's Science Diet appears on our pet product recall page, which tracks FDA and CPSC pet recalls from January 2024 to September 28, 2026. Most of the cat-food recalls in that period were raw or freeze-dried products, among them Savage Pet and Wild Coast Raw in March 2025 and Go Raw's Quest Cat Food in 2026.

Cornell's Feline Health Center does not recommend raw diets for cats.

Frequently Asked Questions

What does a VOHC seal actually require?

Tufts' dental article says a product needs results from two tests in healthy pets, using it the way it is marketed, and has to show at least a 15% difference. Brushing is still the best way to keep teeth and gums healthy, Tufts says.

Are male cats more at risk of a urinary blockage?

Yes. Cornell says male and neutered male cats are at greater risk of obstruction than females because their urethra is longer and narrower. In a male cat, straining with little urine is an emergency.

Besides wet food, what helps a cat prone to urinary trouble?

Less stress and easy litter boxes. Cornell names changes in the home, in the feeding schedule and in the number of animals as triggers, and suggests one more litter box than there are cats, kept in quiet, safe spots.

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PetProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. AAFCO statements, moisture and calorie figures are the makers' own, from their websites and listings. This guide is general information and is not veterinary advice.