Cognitive dysfunction in dogs is a progressive degenerative condition of the brain, similar to dementia in people. Initial signs can be a change in sleeping pattern, increased anxiety and staring. As the disease progresses, dogs may become lost in the house, stuck in corners, and start urinating and defecating in the house. some dogs sleep heavily during the day and are awake at night. Although the condition is not reversible, some medications and supplements may be of help. Together with your veterinarian changes can be made that may improve your dog's and your own quality of life.