--- title: "Dogs' Cognitive Decline Can Be Detected Earlier with New Assessment Tool" url: https://newscentral.site/dogs-cognitive-decline-can-be-detected-earlier-with-new-assessment/ language: en publisher: "News Central Site" section: "Science" published: 2026-10-23T11:40:01.000Z updated: 2026-10-24T06:43:26.393Z id: 39578953-0431-4775-a2f9-13c71d14fa70 source: "Phys.org https://phys.org/news/2026-10-window-cognitive-decline-dogs.html" attribution: "Link to https://newscentral.site/dogs-cognitive-decline-can-be-detected-earlier-with-new-assessment/ and name News Central Site when you quote or summarize this story." --- # Dogs' Cognitive Decline Can Be Detected Earlier with New Assessment Tool A new assessment tool called CANID has been developed to detect cognitive decline in dogs as early as age seven or eight, several years before obvious symptoms of dementia appear. Watching a dog struggle with age-related issues can be heart-wrenching. As dogs get older, they may start to exhibit signs of dementia, such as getting lost at home or displaying increased anxiety. To identify cognitive decline in dogs earlier on, researchers from the University of Arizona have developed an assessment tool called CANID, which stands for Cognitive Assessment for Neuropsychological Impairments in Dogs. This 40-minute evaluation consists of three simple tasks that measure a dog's memory and behavioral flexibility. CANID can detect subtle signs of cognitive impairment in dogs around the age of seven or eight, several years before the more obvious symptoms of dementia appear at about 12 to 14 years old. The assessment is designed to be non-invasive, as it cannot involve directly asking questions to the dog. "We can't ask them questions; we can't tell them, 'OK, this is the test of your memory,'" said Dr. Evan MacLean, senior author and professor in the U of A's College of Veterinary Medicine. Researchers sought to create an innovative way to assess canine cognitive function by designing games that test memory and impulse control in dogs using treats as rewards. These games are part of a study published in Animal Cognition, led by Ph.D. student Stephanie Hargrave from the Department of Psychology. The existing methods for detecting dementia in dogs rely heavily on owner surveys, which may not catch problems until they become apparent. Owner surveys have limitations, according to Hargrave, as they only identify cognitive impairment when it is severe, and at that point, treatment options are limited. The designed games require specialized equipment and trained staff, but they provide valuable insights into the aging process in dogs' brains. In the second game of the hide-and-seek series, dogs are presented with a treat being hidden behind one of four wooden barriers and must remember its location after waiting up to 40 seconds. This wait period can sometimes be accompanied by distractions, adding an extra layer of complexity for the canine participant. The third game in the series allows dogs to physically walk around a barrier to reach their food reward. However, the researchers introduce a twist by secretly blocking one route behind the barrier each time the dog learns the open path. This dynamic adjustment keeps the dogs on their toes and requires them to adapt quickly. The performance of each dog across these three games is combined into a single score, providing a comprehensive assessment of their cognitive abilities. A total of 239 dogs were tested in Tucson and California, with many participants retested six months and one year later to gauge any changes in their scores. The results showed that the scores remained consistent over time, mirroring the stability seen in human neuropsychological tests. Interestingly, the data did not support the assumption that larger breeds, such as Great Danes, would experience cognitive decline sooner due to their shorter lifespans. Instead, research suggests that there is a single trajectory of cognitive decline in dogs, regardless of breed size. This finding implies that even large breeds may not necessarily face significant cognitive impairment before reaching the end of their lifespan. The research on dog aging has significant implications for our understanding of canine cognitive decline and potential parallels to human neurodegenerative diseases such as Alzheimer's. In particular, small breeds like Chihuahuas may be more likely to experience age-related cognitive impairment due to their longer lifespan, allowing them to reach an advanced age where such decline is more pronounced. The study highlights the relevance of studying canine aging in relation to its potential impact on human health. As MacLean notes, dogs are surrounded by the same environmental factors as humans and can develop similar conditions, including amyloid plaques associated with Alzheimer's disease. Dog owners interested in contributing to this research can enroll their pets in ongoing cognitive aging studies through organizations such as Arizona Canine Cognition Center or the nationwide Dog Aging Project. Researchers have developed a new tool to assess cognitive decline in dogs, which is expected to contribute significantly to future research on canine aging. The CANID (Cognitive Assessment for Neuropsychological Impairments in Dogs) evaluation has been designed as an efficient and repeatable method for studying the effects of age on dog cognition. This development comes at a time when many dog owners are concerned about preserving their pets' mental health as they grow older, with some even seeking ways to prevent cognitive decline. The creation of CANID is seen as a crucial milestone in canine aging research, offering new insights into the complex processes underlying cognitive impairment in dogs. --- Source: [Phys.org](https://phys.org/news/2026-10-window-cognitive-decline-dogs.html) Published by News Central Site: https://newscentral.site/dogs-cognitive-decline-can-be-detected-earlier-with-new-assessment/