Wet vs Dry Dog Food: What's the Difference?

At a glance

• Wet food contains 70-80% moisture; dry kibble around 10% — this affects how much actual food your dog is eating per gram
• Kibble often requires high-starch binders to hold its shape during manufacturing; wet food doesn't have the same structural constraint
• Wet food is generally more palatable — stronger aroma, softer texture, closer to what dogs instinctively want to eat
• Dry kibble provides some mild abrasive action on teeth, but it's not a substitute for proper dental care
• Fresh food sits in its own category — higher moisture than kibble, less processed than most wet food, with ingredients you can actually recognise

What's actually different between wet and dry dog food?

Wet and dry dog food are fundamentally different in how they're made, what they contain, and how your dog's body processes them. The most obvious difference is water content — wet food is typically 70-80% moisture, dry kibble is around 10%. But that's just the starting point.

Dry kibble is manufactured through a process called extrusion — the ingredients are ground down, mixed with water and steam, then forced through a machine at high heat and pressure to create those familiar uniform pellets. That process requires a significant amount of starch (often from wheat, corn, or potato) to hold the shape. Most standard kibbles are 30-60% carbohydrate as a result, regardless of what the front of the bag says about protein.

Wet food skips the extrusion step. It's cooked and sealed into pouches or tins, which means manufacturers don't need the same starchy binders. That often — though not always — means higher meat content and fewer fillers. The key word is "often." Reading the label properly matters enormously here, because not all wet foods are created equal.

Does moisture content actually matter for my dog's health?

Yes, and more than most people realise. Dogs have a relatively low thirst drive compared to cats, which means they naturally absorb a lot of their fluid intake through food. A dry-fed dog may drink more water to compensate, but many don't drink enough to fully make up the difference.

Higher moisture intake supports kidney function, urinary tract health, and general hydration — particularly relevant for older dogs, dogs prone to urinary crystals, or dogs in warm weather. Wet food helps here simply because the water is built in.

Dry food's lower moisture also means it's more calorie-dense by weight. A 100g portion of kibble delivers far more calories than 100g of wet food. That's not inherently a problem, but it does mean portion sizes look very different between the two formats, and owners new to switching formats sometimes underfeed or overfeed during the transition.

Which is better for digestion?

This depends heavily on ingredient quality, not just format. That said, wet food — especially food made with named, whole meat sources and minimal processing — is generally easier for dogs to digest than highly processed dry kibble.

The high-heat extrusion process used to make kibble degrades some nutrients and can reduce protein digestibility. Synthetic vitamins and minerals are added back in afterwards to compensate. Wet food cooked at lower temperatures retains more of what was naturally present in the ingredients.

Dogs with sensitive stomachs often do better on wet or fresh food for exactly this reason. The ingredients are less altered, and there are typically fewer hard-to-digest starches and additives working through the gut. If your dog regularly has loose stools, wind, or an unsettled stomach on dry food, the format and ingredient quality of what they're eating is worth examining before assuming it's a medical problem. If symptoms persist or worsen, speak to your vet.

It's also worth knowing there's a third category beyond wet and dry: fresh dog food. Marleybones, for example, uses a Pantry Fresh format — ingredients prepared fresh, sealed raw, and slow-cooked in the pouch. No preservatives, no freezer needed, and the cooking happens gently inside the pack so nutrients stay intact. The result sits closer to home cooking than either tinned wet food or processed kibble.

Is dry food better for teeth?

Kibble does provide some mechanical abrasion as dogs chew, which removes a small amount of plaque. But the evidence for dry food as meaningful dental care is limited. Most dogs don't chew kibble long enough for it to make a significant difference, and the starch content in many kibbles actually feeds the bacteria that cause plaque build-up in the first place.

Proper dental care — chews, tooth brushing, dental supplements — is far more effective than relying on food format. The relationship between diet and dental health is more nuanced than "dry food cleans teeth."

So which should I choose?

There's no single right answer, but there are useful questions to ask. What are the actual named ingredients? What percentage is real meat? How was it processed? A high-quality wet food beats a poor-quality kibble. A well-formulated complete kibble beats a wet food full of derivatives and thickeners.

Many owners feed a combination — kibble as a base with wet food mixed in for palatability and hydration. Fussy dogs in particular often respond well to wet or fresh food when dry food has stopped holding their interest — and fresh food is increasingly worth considering as a complete alternative to kibble. Marleybones meals are complete for all life stages, including puppies, so they work as a standalone diet rather than just a topper.

Focus on what's in the food, not just what form it comes in. Format is a starting point. Ingredients are the real story.

Every dog is different — build your personalised Marleybones feeding and health plan tailored to your dog's age, size, and health requirements.

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FAQs

Can I mix wet and dry dog food together?

Yes. Mixing wet and dry food is common and generally fine. It can improve palatability for fussy dogs and adds moisture to a dry-food diet. Make sure you adjust portion sizes from both to avoid overfeeding — both foods count toward your dog's daily calorie intake.

Is wet food more expensive than dry food?

Per meal, wet food typically costs more than dry kibble. Kibble is calorie-dense and shelf-stable, which makes it cheaper to produce and store. Premium wet and fresh foods cost more but often provide higher meat content and fewer fillers, which can mean you're getting better nutritional value per pound spent.

Is wet food better for puppies?

Wet food can be easier for puppies to eat, especially during weaning, as the softer texture is gentler on developing teeth and jaws. What matters most is that the food is nutritionally complete for growth — check that it explicitly states it's suitable for puppies or all life stages. Marleybones meals meet FEDIAF nutritional standards and are complete for all life stages including puppies.

Does dry food last longer than wet food once opened?

Yes. An opened bag of dry kibble stays fresh for several weeks if sealed properly. Opened wet food — tins or pouches — should be refrigerated and used within 24-48 hours. Pantry-fresh formats like Marleybones are sealed and shelf-stable before opening, but follow the same rule once open.

Which is better for dogs with a sensitive stomach?

Wet or fresh food made with named, whole ingredients is usually better tolerated by dogs with sensitive stomachs than highly processed dry kibble. The lower starch content and gentler processing reduce the digestive load. If your dog consistently reacts badly to food, an elimination diet or vet assessment is the right next step.

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