Is gently cooked dog food healthier than kibble?

Gently cooked dog food can be more digestible and can produce different glucose, stool, microbiome and metabolite responses than kibble, but there is not yet good evidence that the cooking format itself makes dogs healthier or helps them live longer. The strongest studies test specific foods, and many change ingredients, protein, fat, carbohydrate and fiber at the same time as processing. 1 2

A useful way to think about it is: processing can matter, but it is only one part of the food. Nutritional adequacy, calorie intake, protein and other nutrients, body condition, tolerance and quality control usually matter more than whether a label says fresh, gently cooked or kibble.

What does "gently cooked" actually mean in the research?

Studies use terms such as fresh, mildly cooked and minimally processed for specific products and cooking methods. They are not interchangeable diets.

For example, a 2026 University of Sydney crossover study tested a commercial chicken-based food that was minced, cooked to a maximum of 90°C and frozen against an extruded kibble. Both were nutritionally complete, but they were very different formulas: the gently cooked food supplied about 52% of calories from protein and 11.8% from carbohydrate, versus 19.9% and 48.2% for the kibble. 1

That matters because if the dogs respond differently, the cause could be processing, ingredients, macronutrients, fiber, food structure, or a combination of them.

What happens when dogs actually eat gently cooked food?

There are real differences, but "different" is not automatically "healthier."

In the 2026 Sydney study, 24 healthy pet dogs entered a randomized crossover trial and 23 completed both diet periods. Each experimental diet was fed for two weeks after transition. The minimally processed food produced a lower post-meal glucose response, different appetite-hormone responses, firmer stools and higher gut-microbial alpha diversity than the kibble. 1

Those are interesting findings, especially because the dogs remained in normal home environments. But the study was short, and the two foods differed substantially in macronutrient composition. The authors explicitly said long-term feeding studies are needed and that direct associations between processing level and chronic disease have not been established in dogs. The research was co-funded by Lyka Pet Food, and one author was a Lyka employee. 1

A 2024 study used ten healthy beagles in five 35-day diet periods, comparing one fresh food, one extruded food and three raw or freeze-dried foods. The extruded diet had lower fat digestibility than the other diets, but fresh food did not simply win every measure. Protein digestibility in the fresh and extruded foods was not separated in the same way, and the fresh and extruded diets had similarly looser average stools than some raw formats. Microbial communities differed substantially among diets. 2

The researchers stressed an important limitation: ingredients, macronutrients and processing all changed together, so the study could not isolate what caused the differences. It was funded by Primal Pet Foods, and one author was a Primal employee. 2

Earlier controlled feeding work also found that tested mildly cooked diets could have high protein and fat digestibility and produce different fecal microbial patterns than extruded food. Again, those were specific formulations rather than proof that every gently cooked food is superior to every kibble. 3

A new 2026 study helps separate processing from ingredients

One of the hardest problems in this research is that a fresh chicken-and-rice food and a kibble are rarely the same recipe processed two ways.

A Journal of Animal Science study published August 31, 2026 addressed that problem more directly. Researchers started from the same raw batch and processed it into five formats: a retorted pouch, sous-vide, steamed, high-pressure processed raw and freeze-dried raw. Ten adult beagles ate each format in a replicated crossover design. 4

Processing method changed nutrient digestibility and several fecal metabolites. The steamed mildly cooked format had higher dry-matter and organic-matter digestibility than several other formats, and energy digestibility was higher in the steamed, sous-vide and high-pressure-processed diets than in the freeze-dried and retorted diets. But gastrointestinal transit time, stool score, stool moisture, and microbial alpha and beta diversity did not differ by format. 4

This is useful evidence that processing itself can alter digestion. It still does not answer whether gently cooked food causes less disease or longer life, and it was not an extruded-kibble comparison. One author was affiliated with Primal Pet Foods and listed funding acquisition among his contributions; the full funding statement was not accessible in the public article view checked for this review. 4

Do the metabolic changes look better over a full year?

A 2025 study followed 22 healthy geriatric Alaskan sled dogs after a four-month kibble washout. Ten remained on kibble and 12 switched to a fresh human-grade diet for a year. Calories were adjusted to maintain body weight and ideal body condition. The fresh-fed dogs developed a substantially different serum metabolomic profile, including lower measured advanced glycation end products and higher concentrations of several metabolites related to amino-acid and fatty-acid metabolism. 5

That is longer-term evidence that changing the diet can change metabolism. It is not evidence that the dogs developed less disease, aged more slowly, or lived longer. The formulas also differed in ingredients and macronutrients; the authors noted, for example, that higher EPA and DHA in the fresh group could be explained by chia seeds and salmon oil in that diet. Three authors were employed by The Farmer's Dog, which funded the study and was involved in writing and revision. 5

Is lower-temperature cooking automatically better because of AGEs?

No. Processing chemistry is more complicated than a simple "less heat = healthier" rule.

A 2026 laboratory survey measured Maillard-reaction products in 41 commercial dog foods: 15 fresh, 13 kibble, 10 wet, two freeze-dried and one cold-pressed. Fresh foods had more lysine and less lysine blockage than kibble on average, and their CEL concentrations were lower. But the different Maillard products did not move in one simple "fresh low, kibble high" pattern; wet foods had the highest CML and CEL overall, and the authors' detailed analysis showed that ingredient composition as well as thermal processing influenced the results. 6

That is the more useful takeaway. Measuring an AGE in food is not the same as showing that the food causes disease in dogs. The study was funded by Dogmates Ltd., which supplied the samples, and one author was employed by the company. 6

How should you compare a gently cooked food with a kibble?

Start with the food the dog is actually getting, not the marketing category.

The FDA notes that a food labelled "complete and balanced" is intended to be capable of serving as the sole diet for the stated life stage and must substantiate nutritional adequacy through an AAFCO nutrient profile or feeding-trial route. 7

If you are comparing a high-moisture fresh food with dry kibble, do not compare the protein percentages printed on the bags directly. Compare foods on a calorie basis or, for some nutrient questions, on a dry-matter basis. See how Nara calculates carbohydrates in dog food and how to check whether a dog's food meets calorie and protein needs.

Nara's interpretation

There is enough canine evidence to say that processing format can change digestibility, metabolic responses and the gut environment. There is not enough evidence to rank gently cooked food above a well-formulated complete kibble for long-term health.

That means an owner does not need to switch a dog that is doing well on an appropriate complete kibble simply because another food is described as fresh or minimally processed. A complete gently cooked food can also be a reasonable way to feed a dog if its calories, nutrient profile, quality control and practical fit make sense.

The more useful comparison is dog-specific: total calories, protein and other nutrients, body and muscle condition, digestive tolerance, activity and what the dog actually eats over time.

Nara can help put a specific food into that context rather than scoring it by format alone. Build your dog's free Snapshot.

Evidence confidence

Moderate overall. Confidence is moderate that processing can change digestibility, stool chemistry, glycaemic responses and microbiome composition in healthy dogs because multiple controlled feeding studies show such effects. Confidence is lower that a gently cooked format produces better long-term clinical health than nutritionally appropriate kibble because direct disease, healthspan and lifespan comparisons are lacking and many available studies use different formulations or have pet-food-industry funding.

Sources and editorial note

Research and writing were AI-assisted. Sources were checked on 20 September 2026. This article has not been independently reviewed by a veterinarian. Several feeding studies in this area have commercial funding or authors employed by pet-food companies; those relationships are described above because they matter when interpreting a still-developing evidence base.

1. Campbell L, Thompson M, Muir M, Raubenheimer D, Holmes A. Diet-induced metabolic and faecal microbiome responses in pet dogs fed a minimally processed versus extruded kibble diet. Frontiers in Veterinary Science. 2026;13. Randomized crossover study in pet dogs.
2. Geary EL, Oba PM, Templeman JR, Swanson KS. Apparent total tract nutrient digestibility of frozen raw, freeze-dried raw, fresh, and extruded dog foods. Translational Animal Science. 2024;8:txae163. Replicated crossover study in ten beagles.
3. Algya KM, Cross TWL, Leuck KN, et al. Apparent total-tract macronutrient digestibility, serum chemistry, urinalysis, and fecal characteristics, metabolites and microbiota of adult dogs fed extruded, mildly cooked, and raw diets. Journal of Animal Science. 2018;96:3670-3683.
4. Geary EL, Wang TL, Vogel CL, et al. Apparent total tract nutrient digestibility of frozen raw, freeze-dried raw, mildly cooked, and retorted dog foods. Journal of Animal Science. 2026;104:skag283. Same-formula processing crossover study in ten beagles; public abstract and metadata accessed.
5. Yamka R, Sires R, Wakshlag J, Huson HJ. Serum Metabolomics of Senior Dogs Fed a Fresh, Human-Grade Food or an Extruded Kibble Diet. Metabolites. 2025;15:676. One-year controlled feeding study in 22 geriatric sled dogs.
6. Kocadağlı T, Clarke C, Gökmen V. A Comparative Analysis of Maillard-Derived alpha-Dicarbonyl Compounds and Advanced Glycation End Products in Fresh, Wet, Kibble, and Freeze-Dried Dog Foods. Journal of Animal Physiology and Animal Nutrition. 2026;110:417-426. Laboratory survey of 41 commercial foods.
7. U.S. Food and Drug Administration. "Complete and Balanced" Pet Food. Nutritional-adequacy guidance.

Related questions

• Is raw dog food healthier than kibble?
• Does lower-temperature cooking reduce meaningful AGE exposure in dogs?
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