What Is Inflammaging in Pets? An Interview on Aging

Lucy: It's simply a blend of “inflammation” and “aging” — sometimes written as inflamm-aging. It describes age-related inflammation: what may happen when low-level inflammation keeps simmering at the cellular level over time. That ongoing irritation can become part of the aging process. It is a useful way to explore a pattern, but it is not a diagnosis and it does not mean every older pet is inflamed.

Lucy: Not at all. Acute inflammation is the type of inflammation designed to work in the short term. If a pet is injured or the body encounters infection, toxins or free radicals, inflammation organizes the repair crew. A healthy inflammatory response also includes resolution phases that settle the reaction. The problem begins when those phases do not finish and the body remains in a chronic state of inflammation.

Lucy: That's a good way to picture it. Different types of immune cells communicate through chemical signals called cytokines. Some pro-inflammatory molecules turn the reaction up, while anti-inflammatory cytokines help settle it down. T-helper cells act like traffic controllers, directing the immune response.

Other cells, including B cells and natural killer cells, are part of the broader immune response, but guardians do not need to memorize every role. The central role here is balance: the body needs to defend itself without continuing to damage healthy tissue.

When the signals stay unbalanced, the effects may spread beyond one area because the body's systems are connected. The gut-brain and gut-lung relationships are good examples. Free radicals and other reactive oxygen species can add negative effects: they damage cells, those cells release more warning signals, and a vicious cycle keeps feeding itself.

Lucy: We need to be honest about the limits. Researchers have documented age-dependent changes in canine and feline immunity. A veterinary review found shifts in T-cell activity and inflammatory signalling, including increased production of pro-inflammatory cytokines in older cats.¹

Another study followed three inflammatory markers in healthy dogs and found that the pattern changed with age and body size. It did not show a simple significant increase across every marker or simply copy the pattern usually described in humans.²

So human research can point scientists toward possible mechanisms, but it cannot tell us exactly what is happening in every pet. That is why I use inflammaging as a framework for asking better questions, not as a label to place on a senior dog or cat.

Lucy: Only as a boundary. Those search results are usually about older adults — older people, not senior pets. When that literature says older individuals, it also means humans. Rheumatoid arthritis and Alzheimer’s disease are human diagnoses. Human ageing research can help generate ideas for veterinary study, but those terms should not be pasted onto dogs and cats. In recent years, pet research has begun filling some gaps, but the evidence base is still much smaller.

Lucy: Several molecular mechanisms may overlap. One is cellular senescence. Senescent cells have stopped dividing but remain in tissues, and some release pro-inflammatory molecules. If the body cannot clear senescent cells efficiently, those signals may linger. Mitochondria may also become less efficient, allowing oxidative damage to build.

Body fat is active tissue too, and obesity in pets is associated with low-grade inflammation as well as chronic diseases such as arthritis and diabetes.³ Genetics, infection, existing disease and the gut microbiome may all affect the same picture. There is no single cause and no universal prevention plan.

Lucy: Chronic stress can affect immune balance and may shorten telomeres, the protective ends of DNA strands. Stress, inflammation and accelerated aging can become a vicious cycle. That does not mean a pet must live in a bubble. It means we should pay attention when distress becomes the normal state rather than a brief reaction.

People may use deep breathing for stress management, but pets need supports that make sense for them: a predictable routine, comfortable sleep, enrichment and movement. Pet lifestyle factors matter. A sedentary lifestyle can contribute to lost muscle and mobility, while regular exercise — or more broadly, regular physical activity — can support overall health.

These lifestyle changes should always match the animal's health status. Pain, heart disease or another condition should change the plan, with veterinary guidance. Even small adjustments can play an important role in limiting age-related decline.

Lucy: Because the digestive tract, its gut microbiota and the immune system are constantly interacting. The intestinal lining also encounters food components and bacterial products. When that community becomes unbalanced — what we call dysbiosis — inflammatory signals may rise and may influence age-related inflammation.

The relationship can run in more than one direction: a microbiome change may drive a problem, be caused by one or simply appear alongside it. That is why I would never present probiotics, fermented food or a major diet change as a cure for every pet.

Lucy: Usually it is a pattern, not one dramatic clue. The affected area and underlying cause shape what a guardian sees. Digestive trouble may keep returning. Skin or ears may stay irritated. A pet may seem stiff, stop jumping, lose interest in play or recover slowly after activity. Weight, muscle, sleep, house-training or social behaviour may change. Dental pain, inflamed gums, bad breath or difficulty eating can matter too.

But none of those signs proves inflammaging. They can come from infection, allergies, dental disease, pain and many other causes. Chronic inflammation has been associated with various age-related diseases and chronic diseases, including arthritis, diabetes, cardiovascular disease, autoimmune disorders and cognitive impairment, as well as gastrointestinal, kidney, liver, skin and urinary problems.

It may be one contributor, but it is not automatically the main factor. The practical response is investigation, not self-diagnosis.

Lucy: By starting with the whole pet: history, food, medication, behaviour, body and muscle condition, and the physical exam. No single blood test diagnoses inflammaging. Blood work, urine testing or imaging may help uncover an underlying disease.

C-reactive protein and other inflammatory markers can provide clues in dogs, but they do not name the cause by themselves.⁴ The job is to find what is driving the change and treat that — not simply declare that the pet has inflammaging.

Lucy: Food is one of the daily inputs we can control, so it can have a significant impact on overall health. My version of an anti-inflammatory diet is species-appropriate and built around whole foods rather than fillers and heavy processing. A poor diet can work in the opposite direction.

I am especially cautious about sugar, high-starch or high-glycemic carbohydrates, low-quality proteins, chemical additives and artificial colours or preservatives. I also avoid ingredients such as wheat, soy, corn and high-lectin foods like peas and lentils. Dogs and cats are carnivores, and the foundation should reflect that.

Nutrition can support body condition, cells and immune function, but it cannot stop time or reverse every cause of inflammation. The food still needs to be complete and balanced for that animal's species, life stage and health.⁵ Good nutrition works with veterinary care; it does not replace it.

Lucy: Not automatically. Seeing olive oil, fatty fish or whole grains in advice written for people does not mean those foods should be added to every pet's bowl. The animal's species, calorie needs, medical history and nutritional balance come first. For pets, I would focus on appropriate whole foods and high-quality protein, then make any additions with a clear purpose.

Lucy: I start with high-quality protein. From there, foods such as broccoli or other cruciferous vegetables, leafy greens, a modest amount of berries, and bone broth can bring useful nutrients and antioxidants.

The longer list may include medicinal mushrooms, spirulina or other nutrient-rich algae, healing herbs, bee products, quinoa or millet, and quality fatty acids. The point is not to pile everything into one meal. It is to choose digestible foods with a clear purpose and use them appropriately for the pet.

Lucy: Quality, freshness, dosage and interactions. An omega-3 oil can sound healthy, but a rancid oil may add oxidative stress instead. Herbs, antioxidants and mushrooms are not automatically safe for every animal. A pet with a health condition or prescription medication needs individual guidance. And human nonsteroidal anti-inflammatory drugs should never be given unless a veterinarian specifically directs it.

Lucy: They belong under metabolic health, especially when obesity or diabetes is already a concern. Blood sugar and insulin resistance need veterinary assessment; neither one proves that a pet has inflammaging. They are another reminder that inflammation is connected with the animal's wider health status, not a stand-alone label.

Lucy: No feeding style comes with that guarantee. Ingredient quality matters, but so do nutritional balance, food safety, calorie intake, digestibility and the individual animal. A transition should be gradual and should respect any medical needs. Raw feeding can be one approach; it is not a promise that chronic inflammation will never occur.

Lucy: The good news is that pet guardians can influence many daily inputs. Inflammation in the short term protects; long-term inflammation is the concern. Healthy aging is not built on one miracle food or supplement. It is supported by good nutrition, an appropriate body condition, movement, manageable stress, rest and regular veterinary care.

New or worsening changes involving appetite, breathing, mobility, elimination, sleep or behaviour deserve a call to the veterinarian, and sudden severe changes require urgent care.⁶