Scientists at North Carolina State University enrolled 88 geriatric dogs (average age about 12 years) and evaluated them roughly every six months. At each visit the dogs had comprehensive assessments — physical, neurologic and orthopedic exams, mobility and hearing tests, blood work, and a standardized cognitive test — while owners completed questionnaires that included dementia and pain measures.
Gait analysis was done by two trained observers as each dog walked a straight five‑metre indoor walkway. The researchers measured stride length for thoracic (front) and pelvic (back) limbs and calculated height‑adjusted stride values for analysis.
Results showed that owner‑reported cognitive decline correlated with shorter thoracic limb stride length. This association remained after adjusting for height, age and Canine Brief Pain Inventory (CBPI) scores. By contrast, pelvic limb stride length did not show a relationship with cognitive change. The authors note that thoracic limbs contribute to braking and postural stabilization and may depend more on cortical control and visual‑spatial awareness, which could make them more sensitive to early cognitive decline.
The paper cautions that stride length alone is not sufficient for diagnosis, but combined with other measures it could serve as an early indicator of functional decline and a useful marker of an individual dog’s health trajectory when monitored over time. The study appears in Frontiers in Veterinary Science and was supported by the Dr. Kady M. Gjessing and Rhanna M. Davidson Distinguished Chair of Gerontology at NC State’s College of Veterinary Medicine.
- Sample: 88 geriatric dogs, average age ~12 years.
- Key finding: higher dementia scores linked to shorter thoracic stride.
- Statistical note: a 10‑point CADES increase corresponded to ~1.2% shorter thoracic stride.
Difficult words
- geriatric — relating to old or aging animals or people
- gait analysis — measurement of how an animal walks and moves
- stride length — distance between steps during a single walk cycle
- thoracic — relating to the front part or chest region
- cortical — relating to the brain's outer layer or cortex
- cognitive decline — gradual loss of thinking ability and memory
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Discussion questions
- How might regular measurement of stride length help veterinarians and dog owners monitor a dog's health over time?
- What limitations should researchers and veterinarians consider when using stride length as an indicator of cognitive decline?
