Dementia affects dogs just as it does humans. Called canine cognitive dysfunction syndrome, it may impact up to 60% of dogs over 11. Distinguishing it from normal aging is challenging, but a new study offers a physical clue.
Researchers at North Carolina State University, led by veterinary neurologist Natasha Olby, analyzed 88 elderly dogs and found that shorter stride length in the front legs correlates with cognitive decline, even after accounting for age and chronic conditions.
“We found that the effect of cognitive decline is larger than the effect of age by itself,” Olby says. The gait change was not observed in hind legs, likely because the brain’s cortex integrates more sensory information into front-limb step circuits.
The dogs walked a 5-meter path at their own pace. Shorter front strides consistently matched lower cognitive test scores. While the sign is not diagnostic on its own-arthritis or neck issues could also be causes-owners who notice the change should consult a vet. If cognitive decline is diagnosed, lifestyle interventions can help manage the condition, though there is no cure.
The research was published in Frontiers in Veterinary Science, and the team plans to validate the measure in larger, more diverse dog populations.