How Pet Food Processing May Influence Long-Term Health in Dogs
Interest in fresh and minimally processed diets is growing within companion animal nutrition research, alongside broader discussions about canine longevity and preventive health. Veterinarians are increasingly being asked whether the degree of pet food processing may influence long-term health outcomes in dogs.
Fresh and minimally processed feeding has shifted from a consumer trend to a topic of scientific investigation in companion animal nutrition research. Because companion animals may consume the same style of diet for many years, researchers are examining whether cumulative exposure to heat-generated compounds in processed foods may have implications for long-term health and ageing.
The Pet Longevity Institute has reviewed this emerging area of research in its Research Commentary Paper, Advanced Glycation End Products in Pet Nutrition: Current Evidence on Dietary Exposure and Longevity. The paper examines how different forms of pet food processing may influence exposure to Maillard reaction products, including advanced glycation end products (AGEs) and acrylamide, and what this may mean for companion animal health.
Why pet food processing is being explored as a potential longevity factor
Nutrition and feeding practices are among the most consistent lifelong exposures in companion animal health. Increasingly, longevity research is examining not only what dogs eat, but also how their food is processed.
Thermal processing changes the physical and chemical characteristics of food. While processing can improve shelf stability, palatability and convenience, it can also contribute to the formation of heat-induced compounds known as Maillard reaction products (MRPs).
The degree of processing is unlikely to act independently of other nutritional factors. Ingredient composition, macronutrient balance, caloric intake and nutritional adequacy all remain important considerations when evaluating the health impact of a diet.
What current research suggests about processing levels across pet food formats
Research suggests dietary MRP concentrations may vary significantly across commercial pet food formats.
Studies referenced in the Pet Longevity Institute’s Research Commentary Paper found that canned diets consistently showed the highest AGE levels, while minimally processed diets, including lightly cooked and raw formats, generally showed lower levels. Dry foods appeared more variable, suggesting that ingredient composition and manufacturing conditions may also influence MRP formation.
These findings reinforce that pet food processing exists across a spectrum, not as a simple ‘processed versus fresh’ distinction.
Research has also identified potential nutritional differences associated with higher processing levels.
The Maillard reaction may reduce lysine bioavailability, and some highly processed diets may not meet growing dogs’ lysine requirements. Lysine is an essential amino acid involved in growth, tissue repair and normal physiological function. Minimally processed diets have been shown to contain higher lysine content and lower lysine blockage compared with dry food formats.
Biological pathways linking pet food processing and long-term health
Interest in pet food processing extends beyond differences in dietary exposure to how these compounds may interact with biological pathways associated with ageing, inflammation and chronic disease development.
In human studies, higher dietary intake of MRPs has been associated with markers of systemic inflammation and chronic disease risk. In companion animals, higher dietary MRP intake has been observed to correlate with increased AGE biomarkers in plasma and urine.
Oxidative stress and degenerative disease pathways are also being examined. Research cited in the Pet Longevity Institute’s Research Commentary Paper has identified AGEs in tissues affected by several chronic diseases in dogs, although the significance of this relationship remains unclear.
Researchers are also investigating whether processing-related reductions in nutrient availability, particularly lysine bioavailability, may influence long-term health.
What remains unknown about food processing and long-term canine health
Current research provides early insight into pet food processing and MRP exposure, but methodological limitations and unanswered questions remain.
One of the major challenges is separating the effects of processing level from those of other dietary variables. In several studies, diets differed not only in thermal processing but also in ingredient profile and macronutrient composition, making it difficult to isolate processing as the sole factor influencing outcomes.
Despite lifelong exposure to processed diets in many companion animals, long-term studies linking dietary MRP exposure with clinical outcomes remain limited.
Biomarker studies suggest dietary intake may influence systemic exposure, but the long-term clinical significance remains uncertain.
For veterinarians, this creates a familiar challenge: helping owners make informed decisions in areas where scientific understanding is still evolving and definitive long-term outcome data is not yet available.
Clinical implications of pet food processing research for veterinarians
As pet owners' interest in nutrition and longevity continues to grow, veterinarians are increasingly being asked to interpret emerging research on pet food processing and long-term health.
Current evidence does not support simplistic conclusions that one processing format is universally superior to another, but research suggests that processing level may influence both dietary MRP exposure and nutrient availability.
This creates an opportunity for veterinarians to include food processing discussions within broader nutritional assessments, preventive care planning and longevity-focused conversations.
Practical discussions with owners may include:
explaining that pet food processing exists across a spectrum
discussing nutritional adequacy alongside processing level
helping owners interpret marketing claims critically
acknowledging where evidence is still evolving while considering individual patient factors, including breed, life stage, medical history and lifestyle
Veterinarians often need to help owners navigate complex nutrition information before definitive long-term evidence is available, making balanced interpretation of emerging research an important part of clinical practice.
Key takeaways for veterinary practice
Many dogs consume the same type of diet for years, making cumulative dietary exposure an increasing area of interest in canine longevity research.
Pet food processing is now being investigated as one of several nutritional factors that may influence long-term health and ageing pathways.
Processing level may affect both dietary exposure to Maillard reaction products (MRPs) and nutrient availability, including lysine bioavailability in some diets.
Current research highlights biological associations and potential mechanisms, but long-term clinical outcomes and causative relationships remain unclear.
Discussions about food processing are becoming more common in veterinary practice as owner interest in nutrition, preventive care and longevity continues to grow.
While more research is needed to clarify long-term clinical significance, some veterinarians and owners may consider minimally processed diets a reasonable precautionary approach to reducing dietary MRP exposure.
Veterinarians can play an important role in helping owners interpret emerging nutrition research within the context of balanced, evidence-based dietary guidance.
Our companion article explores the underlying science of AGEs, acrylamide and Maillard reaction products: Food Processing and Pet Health: Understanding Advanced Glycation End Products.
Learn more about pet food processing, longevity and canine health
This article explores whether pet food processing may influence dietary exposure, nutrient availability and long-term health outcomes in dogs.
Our companion article explores the underlying science of AGEs, acrylamide and Maillard reaction products: Food Processing and Pet Health: Understanding Advanced Glycation End Products.
For a deeper analysis of the evidence, download the Pet Longevity Institute Research Commentary Paper: Advanced Glycation End Products in Pet Nutrition: Current Evidence on Dietary Exposure and Longevity.
You can also subscribe to the Pet Longevity Institute e-newsletter to stay informed as new research continues to shape best practice in companion animal health and longevity.
