As people and dogs get older, their brains can change. In people, a disease called Alzheimer’s disease causes memory loss, confusion, and changes in behavior. In older dogs, a similar disease happens, and veterinarians call it Canine Cognitive Dysfunction, or CCD for short. CCD is sometimes called “dog dementia.”
Both Alzheimer’s and CCD affect the brain and how it works. In both diseases, dogs and people can have trouble remembering things, can get confused, and can act differently from before. For example, a dog may forget where the door is, seem lost in familiar places, have trouble sleeping, or not respond to family members the way they used to. These changes are very much like what happens in humans with Alzheimer’s.
Scientists have found that the brains of people with Alzheimer’s and dogs with CCD show similar changes at the microscopic level. In both brains, a protein called beta-amyloid can build up. When beta-amyloid sticks together, it makes clumps called plaques. These plaques are thought to hurt brain cells and make it harder for the brain to work normally.
In both diseases, the brain slowly stops working as well as it used to. This means that the problems usually get worse over time. Memory, learning, and the ability to adjust to new things can all be affected. In humans, Alzheimer’s is a major reason why older adults lose memory and thinking skills, and in dogs, CCD is a common reason older pets show signs of confusion and behavior changes.
Even though the diseases are similar, there are differences too. For example, not all the brain changes seen in human Alzheimer’s happen in dogs, and the exact causes of CCD are still being studied. Scientists also use what they learn about CCD to better understand Alzheimer’s in people, because older dogs naturally develop some of the same brain changes.
There is no cure yet for Alzheimer’s disease in people, and there is no cure for CCD in dogs. But veterinarians and doctors work to help people and pets stay as comfortable and happy as possible for as long as they can. Treatments and care plans focus on improving quality of life and helping with daily behavior, not just the biological changes in the brain.
Just like in people, being aware of early changes can help caregivers, families, and veterinarians take steps to support someone living with Alzheimer’s or a dog living with CCD. Fun activities, routines, mental stimulation, and love can all make a big difference in quality of life.
Here is a free screening tool you can do at home to evaluate your dog for CCD
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