Cerebral neuronal lipofuscinosis type 8 (NCL8) is a hereditary neurodegenerative disease observed in certain breeds such as the German Shorthaired Pointer and the Australian Shepherd. Puppies develop normally until 12–14 months of age, after which signs of neurological degeneration appear, including visual impairment, repetitive behaviors, and decreased responsiveness to commands. The disease progresses to blindness, ataxia, and loss of motor function in the limbs, accompanied by frequent epileptic seizures. Due to the severity of symptoms and rapid progression, affected animals are often euthanized before 27 months of age.

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Breed

German Pointer, Australian Shepherd, Huntaway , New Zealand Heading Dog