Dry Food vs Wet Food: How to Think About Your Dog's Diet

What Actually Differs Between the Two Formats

Dry food (kibble) and wet food (canned or pouched) are both legitimate ways to feed a dog a complete diet — but the differences in how they're made and what they contain matter in practice.

The most significant difference is moisture content. Wet food typically contains 70–80% water, while dry kibble contains around 10%. That gap affects everything from calorie density to how much you feed per meal. Because wet food delivers far more water per gram, dogs eating it consume fewer dry-matter calories per can — which means you need to compare the two formats on a dry-matter basis to judge their nutritional content fairly, not just from the label percentages.

Kibble is produced through extrusion — ingredients are cooked under high heat and pressure, then dried into shelf-stable pellets. Wet food is cooked inside sealed cans or pouches, which preserves moisture and often results in a stronger aroma and more palatable texture. Both formats can be nutritionally complete, provided they carry an AAFCO nutritional adequacy statement. See our guide to reading dog food labels for help decoding what that statement actually means.

Hydration, Dental Health, and Digestibility

For dogs prone to urinary tract issues, kidney disease, or chronic dehydration, the moisture advantage of wet food can be clinically meaningful. Veterinary nutritionists often note that dogs on wet diets tend to produce more dilute urine, which may reduce the risk of certain urinary crystals forming. That said, wet food is not a treatment for any condition — consult your vet if your dog has a diagnosed urinary or kidney problem.

Dry food is sometimes credited with promoting better dental health because the mechanical action of chewing hard kibble may help reduce plaque buildup. In reality, the evidence here is modest. Some studies suggest kibble offers a minor benefit over wet food for tartar, but it is not a substitute for brushing or professional dental cleanings. Dogs can develop significant dental disease on kibble alone.

Digestibility varies by formula more than by format. A high-quality wet food and a high-quality dry food can both be highly digestible. Cheaper formulas in either format may use lower-quality protein sources that are harder for dogs to process efficiently.

Cost, Storage, and Day-to-Day Practicality

On a per-calorie basis, dry food is almost always less expensive than wet food. For a medium or large dog, feeding wet food exclusively can cost two to four times more per day than feeding kibble. This is a real consideration, especially over a dog's lifetime. Our article on the real costs of owning a dog puts food costs in the context of your full annual budget.

Storage is another practical advantage for dry food. An unopened bag of kibble keeps for months at room temperature (away from heat and humidity). Opened wet food cans must be refrigerated and used within a day or two. This matters if you travel with your dog, manage multiple pets, or simply value predictable pantry logistics.

Portion control is more straightforward with kibble — a measuring cup gives consistent results. With wet food, portions are typically calculated by weight or by the number of cans per day, which varies by product and dog size, so reading the feeding guide carefully matters.

A mixed-feeding approach — kibble as the main meal with a small amount of wet food added — is widely practiced and can address palatability issues without dramatically increasing cost. Just be sure to account for the combined calorie contribution from both sources to avoid overfeeding.

This article is for general informational purposes only and is not a substitute for personalized veterinary advice. Consult your veterinarian before making significant changes to your dog's diet, especially if your dog has a health condition.