Why This Debate Gets So Heated
Few topics in pet ownership generate as much passion — and as much misinformation — as the question of what form of food to feed. Raw feeders describe kibble as ultra-processed poison. Kibble advocates point to foodborne pathogen risks in raw diets. Wet food sits somewhere in the middle, often underappreciated. The reality, as is usually the case, is considerably more nuanced than either camp acknowledges. This comparison is built on evidence, not ideology.
Dry Kibble: The Dominant Format
Kibble accounts for the majority of pet food sold globally. It is convenient, shelf-stable, cost-effective, and — when formulated by a reputable manufacturer — nutritionally complete. The extrusion process used to make most kibble involves cooking ingredients under high temperature and pressure, which kills pathogens, improves digestibility of starches, and allows precise nutrient delivery.
Advantages
- Long shelf life and easy storage
- Consistent formulation that meets AAFCO or FEDIAF complete and balanced standards
- Wide range of therapeutic formulations for specific health conditions
- Generally the most cost-effective complete diet option
- Dental abrasion benefit, though modest and often overstated
Limitations
- High processing temperatures can reduce levels of heat-sensitive nutrients, requiring synthetic fortification
- Typically low moisture content (around 8–10%), which may be a concern for cats prone to urinary issues or chronic kidney disease
- Ingredient quality varies enormously between manufacturers and price points
- Ultra-processed nature raises questions — primarily in human nutrition research — about long-term health outcomes that are not yet fully answered in pets
Wet Food: The Underrated Middle Ground
Wet food — whether in tins, pouches, or trays — is often overlooked in favour of the kibble-versus-raw debate. This is a mistake. Wet food typically has a moisture content of 70–82%, which is closer to the natural prey diet of both dogs and cats. For cats in particular, whose ancestors evolved in arid environments and have a blunted thirst drive, wet food's moisture contribution is clinically meaningful.
Advantages
- High moisture content supports urinary tract health, particularly in cats
- Often higher in animal protein and lower in carbohydrate than kibble
- More palatable for many animals, including those with dental disease or reduced appetite
- Useful for administering medications
Limitations
- More expensive per calorie than kibble
- Shorter shelf life once opened
- Some products — particularly complementary pouches — are not nutritionally complete and cannot be fed as sole diets
- Greater environmental packaging burden
Raw Feeding: What the Evidence Actually Shows
Raw feeding encompasses a wide spectrum of approaches, from commercial raw complete diets to home-prepared BARF (biologically appropriate raw food) protocols. Proponents cite improved coat quality, better digestion, reduced stool volume, and more "species-appropriate" nutrition. Critics — including several veterinary professional bodies — raise concerns about nutritional completeness and foodborne pathogen risks. Both sides have valid points.
The Nutritional Completeness Problem
Home-prepared raw diets are frequently nutritionally unbalanced. Multiple studies auditing BARF recipes — including those found in popular books and online forums — have found that the majority fail to meet AAFCO or FEDIAF minimum requirements for at least one nutrient, with calcium-to-phosphorus imbalance and vitamin D deficiency among the most common findings. Commercial raw diets from reputable manufacturers that carry a complete and balanced statement are a safer option than home preparation without specialist nutritional input.
Pathogen Risks Are Real
Multiple studies have identified Salmonella, Listeria, Campylobacter, and E. coli in commercial raw pet foods at rates considerably higher than in cooked alternatives. The risk to healthy adult humans in the household is manageable with good hygiene practices. The risk to immunocompromised individuals, young children, and the pets themselves — particularly those on immunosuppressant medications — warrants serious consideration. A 2019 study published in Veterinary Record identified Salmonella shedding in dogs fed raw diets at significantly higher rates than those fed commercial dry food.
Potential Benefits Worth Acknowledging
Despite the concerns, raw feeding is not without credible positive signals. Some dogs do appear to thrive on well-formulated raw diets. There is reasonable evidence that raw diets, when properly balanced, support a different — and potentially more diverse — gut microbiome than ultra-processed diets. A 2017 study in the journal BMC Veterinary Research found lower faecal pH and different bacterial populations in raw-fed dogs compared to kibble-fed controls, though whether this translates to meaningful health outcomes remains unclear.
Which Format Is Right for Your Pet?
There is no universal answer, and anyone claiming there is should be viewed with scepticism. The right food format depends on your individual pet's health status, your household circumstances, and your budget. Some practical considerations:
- For cats with recurrent urinary issues or early kidney disease, increasing wet food is a well-supported clinical strategy
- For dogs with osteoarthritis or weight management challenges, a veterinary therapeutic kibble often delivers more consistent results than home-prepared alternatives
- For owners who wish to feed raw, commercial complete raw diets from manufacturers with rigorous testing protocols reduce — though do not eliminate — the risks of home preparation
- Mixed feeding, such as combining a complete kibble with some wet food or a small proportion of raw, is a pragmatic middle ground for many animals
The Quality Variable Matters More Than the Format
A high-quality wet food from a reputable manufacturer with a strong nutritional team will almost certainly serve your pet better than a low-quality raw diet assembled from a poorly researched online protocol. The format of the food is secondary to the quality of its formulation, the integrity of its ingredients, and whether it has been validated to meet your pet's nutritional needs across their life stage. Feed the best quality food your budget and circumstances allow, in the format most appropriate for your individual animal's health — and do not let ideological tribalism make that decision for you.