What's Really in Your Dog's Bowl? A Closer Look at Ultra-Processed Food

You’ve probably seen the headlines. From breakfast cereals to ready meals, the term 'ultra-processed food' (UPF) has become a hot topic in human nutrition, with study after study linking it to a range of health concerns [1]. It's a conversation that has left many of us scrutinising our own shopping baskets. But it also raises an important question for dedicated dog owners: what about the food we feed our pets? Most dogs in the developed world eat a diet of commercially prepared food, often for their entire lives [1][3]. If heavy processing has an impact on health, our dogs could be particularly exposed. The familiar crunch of kibble and the soft texture of tinned food are the result of complex industrial manufacturing. Do these methods align with what scientists are now labelling as ultra-processed? This article will explore the science behind food processing, how it relates to your dog's dinner, and what the emerging evidence suggests about the long-term health of our canine companions. While the classification systems used for human food don’t transfer perfectly to the world of pet food, the principles behind them offer a valuable new lens through which to view our dogs' diets […

What Does 'Ultra-Processed' Actually Mean?

The discussion around processed foods gained a powerful tool with the development of the NOVA classification system. Created by researchers in Brazil, NOVA isn’t an acronym but the Portuguese word for 'new', reflecting its novel approach. Instead of categorising food by its nutrients (like fats, proteins, or carbohydrates), NOVA groups food based on the nature, extent, and purpose of the processing it has undergone [1]. The system has four main categories: **Group 1: Unprocessed or Minimally Processed Foods.** These are foods in or close to their natural state. Think fresh vegetables, raw cuts of meat, fresh fish, eggs, and pasteurised milk. Processing is minimal—limited to things like cutting, grinding, freezing, or boiling to make the food safe and edible [1]. **Group 2: Processed Culinary Ingredients.** These are substances extracted from Group 1 foods or from nature, such as oils, butter, sugar, and salt. They aren’t meant to be eaten alone but are used in kitchens to prepare Group 1 foods [1]. **Group 3: Processed Foods.** These are relatively simple products made by combining foods from the first two groups. Examples include canned vegetables in brine, fruits in syrup, chees…

> **Key Terms at a Glance** > > **NOVA:** A food classification system that categorises foods into four groups based on their level of industrial processing [1]. > > **UPF (Ultra-Processed Food):** The fourth and most processed category in the NOVA system. These are industrial formulations with long ingredient lists and numerous additives [1]. > > **AGEs (Advanced Glycation End-products):** Potentially harmful compounds that form when proteins or fats are exposed to sugars and high heat during processing [2].

Is Your Dog's Food Ultra-Processed?

When you read the description of UPFs—industrial formulations, ingredients like protein isolates, and additives to enhance flavour and texture—it might sound uncomfortably familiar. Many popular commercial dog foods, especially dry kibble and tinned wet foods, share features with human UPFs [1]. Let's look at how a typical bag of kibble is made. The process, known as extrusion, involves several stages. First, a mixture of ingredients, which may include already-processed items like meat meals, grains, and fats, is combined into a dough [2]. This dough is then cooked under intense heat and pressure before being forced—or extruded—through a die that cuts it into the familiar kibble shapes. After that, it’s heated again to dry it out, and finally, it's often coated with more fats and flavourings to make it appealing to dogs [2]. Tinned foods also undergo significant thermal processing to ensure they are sterile and shelf-stable [1]. Based on this, it seems simple to label these foods as ultra-processed. However, it's not quite that straightforward. A crucial difference is that commercial pet foods sold as "complete" are legally required to be nutritionally balanced for a dog's life st…

Variety of pet food formats

Variety of pet food formats _Photo: Tanprasertsuk J, Tate DE, Tarr DS and Shmalberg J (2026) Does the definition of human ultra-processed foods apply to dog and cat foods? A review of pet food processing techniques, their impact on health, and a call for pet food processing classification. Front. Vet. Sci. 13:1690420. doi: 10.3389/fvets.2026.1690420_

The Hidden Chemistry of High-Heat Cooking

If a bag of kibble is "complete and balanced," providing all the necessary vitamins, minerals, and macronutrients, why should the processing matter? The growing concern focuses less on what’s on the nutrition label and more on the chemical changes that happen to ingredients when they are subjected to industrial processing. One of the most significant concerns revolves around compounds called **Advanced Glycation End-products**, or AGEs. These form when proteins or fats combine with sugars in the presence of heat, a chemical process known as the Maillard reaction [2]. This is the same reaction that gives bread its golden-brown crust and grilled meat its distinctive flavour. While it makes food tasty, it also creates AGEs. In humans, a high dietary intake of AGEs is linked to oxidative stress and inflammation, which are underlying drivers of chronic conditions like diabetes, kidney disease, and heart problems [2]. The body can’t easily get rid of them, so they can accumulate over time. This is where the science becomes particularly startling for pet owners. A 2020 review highlighted that processed foods, especially those cooked at high temperatures, significantly increase AGE intake…

Connecting Diet to Dog Health: The Emerging Evidence

While the theoretical risks are compelling, what does the real-world evidence say? Research comparing different types of whole diets for pets is still surprisingly limited [2]. However, a few pioneering studies have started to draw some intriguing connections. The DogRisk research group at the University of Helsinki has produced several notable papers. In one 2023 study, they compared dogs fed what they termed an 'ultra-processed carbohydrate-based diet' (essentially kibble) with those on a 'non-processed meat-based diet'. They found that puppies whose mothers ate the non-processed diet during pregnancy, or who were fed it themselves in early life, had a significantly lower risk of developing chronic ear inflammation (*otitis*) later on [2]. Another study from the same group looked at chronic enteropathy, a serious gastrointestinal disorder in dogs that resembles inflammatory bowel disease (IBD) in humans. The results were stark: feeding puppies a non-processed diet, including leftovers and raw bones, was strongly protective against the disease. In contrast, an exclusive diet of kibble was identified as a major risk factor [2]. These findings resonate with what many veterinarians…

A New Perspective on Your Dog's Dinner

The conversation around ultra-processed food is complex, and it’s clear we can’t simply take the human NOVA classification and apply it to a bag of dog food. Commercial pet foods are designed to be complete and balanced in a way that a human ready meal is not [1][2]. However, the core principles of the UPF debate remain highly relevant. The industrial methods used to create shelf-stable kibble and tinned food—particularly the use of high heat and pressure—fundamentally change the food's chemical makeup. This processing can create potentially harmful compounds like AGEs in quantities far exceeding those in human diets [2]. While we lack definitive long-term studies, the emerging research and the parallels with human health trends suggest that a lifetime of eating a heavily processed diet could be a significant contributing factor to the chronic diseases we see in our dogs today [2][3]. Until a dedicated pet food classification system is developed and more independent research is conducted, we are left to navigate this landscape as best we can. This isn't about demonising one type of food. It's about being informed and curious. Understanding that the *degree of processing* is a fact…

Sources

1. Frontiers | Does the definition of human ultra-processed foods apply to dog and cat foods? A review of pet food processing techniques, their impact on health, and a call for pet food processing classification — https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2026.1690420/full 2. Should pet owners worry about kibble safety? | Fi Global Insights — https://insights.figlobal.com/ultra-processed-foods/should-pet-owners-be-concerned-about-ultra-processed-pet-food- 3. Dogs, Cancer and Ultra-processed (Dry Kibbled) Food | Raw Feeding Veterinary Society — https://rfvs.info/dogs-cancer-and-ultra-processed-dry-kibbled-food/