Dogs have dementia very similar to Alzheimer’s disease in humans.
The official name of the disease is called Canine Cognitive
Dysfunction Syndrome (CCDS). According to a recent study by the
University of California, 28% of dogs aged 11-12 years and 68% of
dogs aged 15-16 years suffer from CCDS.
What are the symptoms of cognitive dysfunction syndrome in dogs?
Disorientation
Dogs show behaviors such as getting
lost at home, not recognizing
familiar people or animals.
Interaction changes
Social activities decreased
between the dog and the
owner or other animals.
Sleep/wake cycle changes
Dogs sleep more during the day, wake at night, or have irregular sleep/wake cycles.
House soiling
Dogs urinate or defecate whether the owner
is in or out of the house and damage things
in the house.
Activity level change
Dogs show declined activity levels and decreased interest in play.
As dogs get older, their vitality and appetite generally decrease, and the radius of action decreases, so even if they have CCDS, owners can often overlook it as a natural aging.
However, natural aging alone does not cause the symptoms above, so you must suspect CCDS.