The wet-versus-dry argument is presented online as though one is food and the other is junk. It is not that simple. A complete and balanced wet food and a complete and balanced dry food will both keep a dog healthy for a lifetime. The differences are real, but they are practical differences, not moral ones.
What “complete and balanced” means
This is the only label claim that really matters. In the United States it means the food meets AAFCO nutrient profiles for a life stage; in Europe, FEDIAF. A food labelled complementary — most toppers, many “gourmet” pouches, almost all treats — is not designed to be fed on its own.
Check this first. It filters out more bad choices than any ingredient list will.
Water content
Dry food sits around 8 to 10 percent moisture. Wet food is usually 75 to 80 percent.
That single difference drives most of the others. It is why wet food is more expensive per calorie, why it spoils once opened, and why it suits dogs who do not drink enough — particularly dogs with a history of urinary crystals or kidney disease, where a vet may specifically want more water going in with meals.
For a healthy dog with a water bowl they use, the moisture difference is convenient rather than critical.
Calorie density and portion size
A cup of dry food might carry 350 to 450 calories. The same volume of wet food carries a fraction of that.
That makes wet food genuinely useful for weight management: a dog on a diet gets a bowl that looks and feels like a meal rather than a joyless handful. It also means that if you switch a dog from dry to wet by eyeballing the portion, you will almost certainly underfeed at first. Use the calorie figure on the pack, not the volume.
Teeth
The claim that kibble cleans teeth is mostly marketing. Standard kibble shatters on contact and does very little scrubbing. There are specific dental diets with larger, fibre-aligned pieces designed to wipe the tooth surface, and those do have evidence behind them — but ordinary dry food is not a toothbrush.
The flip side is also overstated: wet food does not rot your dog’s teeth by itself. Periodontal disease in dogs is driven by plaque, genetics, and mouth conformation far more than by food texture.
The thing that actually protects teeth is brushing them.
Palatability
Wet food wins, and it is not close. Warmth, smell and texture all work in its favour. This matters for:
- Dogs recovering from illness or coming off a general anaesthetic
- Senior dogs whose sense of smell has faded
- Genuinely fussy eaters, where wet food can restart eating
It is also why many people end up on a mixed feed — dry as the base, a spoon of wet stirred through. That is a perfectly reasonable choice as long as you count both towards the daily total.
Cost and practicality
Per calorie, dry food is usually two to four times cheaper. It stores for months, travels well, works in puzzle feeders and food-dispensing toys, and can be measured in seconds.
Wet food needs refrigeration once opened, is used within a couple of days, generates packaging, and cannot be left down.
For a large dog, the cost difference is the deciding factor for most households, and there is nothing wrong with that.
The mixed-feeding question
Mixing is fine. The old claim that wet and dry digest at different rates and “ferment” in the stomach is not supported.
Two practical rules:
- Count the calories from both. This is where most accidental weight gain comes from.
- Keep the ratio roughly consistent day to day. Dogs’ guts adapt to a diet; large daily swings cause loose stools.
So which should you choose?
Choose dry if cost, storage, enrichment toys or convenience matter most, and your dog drinks normally and eats willingly.
Choose wet if your dog needs more water, needs to lose weight on a satisfying volume of food, is fussy, is elderly, or has dental pain that makes crunching uncomfortable.
Choose a mix if you want the economics of dry with the palatability of wet.
What matters far more than the format is that the food is complete and balanced, that your dog does well on it — good stool, good coat, stable weight, good energy — and that you feed the right amount.
