People with older dogs are often left wondering when changes to their dog’s behavior start happening… changes like circling at night,disorientation ,confusion or blank staring. Other changes can occur with sleeping habits, forgetting learned behaviors such as obedience and cleanliness , showing sudden reservation or aggression towards family members, forgetting familiar voices or people and even vocal events like repeated barking or howling. It is sometimes difficult to determine whether these symptoms are due to aging or to a pathology. The cognitive dysfunction syndrome results in a gradual loss of cognitive abilities, such as awareness, perception of the environment, learning ability and memory. If your older dog has unusual behavior, tell your veterinarian. A good medical examination and appropriate testing will eliminate other diseases that can also cause similar symptoms . If cognitive dysfunction is involved, do not lose hope. Certain medications and a special diet can significantly improve the symptoms associated with such syndrome.