The most common sign of intervertebral disc disease is discomfort that is localized in the back or neck. Disc diseases in the upper back can cause pain, paralysis, or urinary incontinence. The most serious cases are loss of bladder function and dogs that can no longer feel pain. In more extreme cases, patients often have difficulties walking; ranging from poor control of the hind limbs - either weakness or a ‘drunken ship’ walk - to complete paralysis.