An international group of experts has developed new guidelines to help veterinarians better recognize and diagnose canine cognitive dysfunction syndrome (CCDS), commonly known as canine dementia. The condition affects many older dogs and can cause changes in behavior, sleep, learning, and daily routines, yet it is often overlooked despite its significant impact on animal welfare. The guidelines also highlight that research on canine dementia has the potential to contribute to our understanding of human dementia, particularly Alzheimer’s disease.