Written by Angela | Updated 2026 Dogs are carnivores. They are also incredibly resilient scavengers, which means they can survive on foods that are biologically inappropriate for years. Survival, however, is not the same as thriving. Yes, a dog can live on kibble. They may even look shiny and energetic for the first few years of life. But what we consistently see — over and over — is that signs of metabolic and degenerative stress begin surfacing around ages five to six in do