Researchers at North Carolina State University followed 88 geriatric dogs, with an average age of about 12 years, and evaluated them at intervals of approximately every six months. At each visit dogs received physical, neurologic and orthopedic exams, mobility assessments, hearing tests and blood work. They also completed a standardized cognitive test and owners answered questionnaires, including measures of dementia and pain.
Gait was measured by two trained observers as each dog walked a straight five‑metre indoor walkway. The team recorded stride length for thoracic (front) and pelvic (back) limbs and calculated values adjusted for height.
The study found that higher owner‑reported cognitive decline was linked to reduced thoracic limb stride length even after adjusting for height, age and pain scores. Pelvic limb stride length did not correlate with cognitive change. The authors say stride length alone cannot diagnose cognitive decline but could help detect early functional change and track a dog’s health over time. The paper appears in Frontiers in Veterinary Science.
Difficult words
- geriatric — related to old age in animals or people
- neurologic — connected with the nervous system and brain
- orthopedic — related to bones, joints, and muscles
- gait — the way an animal or person walks
- stride length — distance of one step by a limb
- thoracic — relating to the front part of the body
- pelvic — relating to the back part of the body
- diagnose — identify an illness or problem by testing
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Discussion questions
- How could measuring a dog’s stride length help owners notice health changes over time?
- Why do you think pelvic limb stride length did not correlate with cognitive change in the study?
- Would you take an older dog to regular exams every six months? Why or why not?
