"When testing does not show treatable medical problems, conventional veterinary medicine offers drug therapy, such as anipryl for treatment of cognitive dysfunction. Though anipryl has offered improvement for some pets, in my experience, the best treatments for aging brains in pets have included corrections of nutritional deficiencies, especially mineral imbalances. In addition, proper hydration, improved levels of Omega-3 fatty acids, reduction of cereal grains and sugars in the diet, and elimination of heavy metals from the central nervous system can bring pets back to a better level of awareness."
http://www.timesonline.com/pets/dr_maro/treatments-available-for-confused-cats-and-demented-dogs/article_b8a74bc8-ce4f-11e4-99f0-6f0c624b443d.html/?REFER-MI=Dr.%20Cynthia%20Maro