The Neuronal ceroid lipofuscinosis (NCLs) are a group of inherited neurodegenerative diseases characterized by accumulation of autofluorescent cytoplasmic antibodies within cells of the nervous system. Affected dogs typically exhibit a condition of cerebellar dysfunction in which voluntary muscular movements tend to result in loss of control and coordination. Symptoms (18 months of age) : Vision loss & full blindness & behaviour changes (hyperactivity, circling, anxiety and decreasing cognitive abilities)