Study Finds Cats Naturally Develop Dementia Mirroring Human Alzheimer’s Disease

A study led by scientists at the University of Edinburgh found that cats can naturally develop dementia resembling human Alzheimer’s disease. Examining the brains of 25 cats exhibiting dementia-like symptoms—such as confusion, disrupted sleep, and increased vocalisation—researchers discovered the buildup of amyloid-beta protein, a hallmark toxic protein found in Alzheimer’s, particularly within synapses crucial for brain cell communication. This breakthrough positions cats as a ‘perfect natural model’ to better understand Alzheimer’s disease, given that previous models mostly relied on genetically modified rodents which do not naturally develop dementia. The findings may lead to improved treatments for both feline cognitive dysfunction and human Alzheimer’s. The study was a collaboration involving the Universities of Edinburgh and California, the UK Dementia Research Institute, and Scottish Brain Sciences, funded by Wellcome and the Dementia Research Institute. Dr Robert McGeachan emphasized that because cats develop these brain changes naturally, they may offer a more accurate model than traditional lab animals, potentially benefiting treatment development for both species and supporting caregivers.