Based on the history you provided, below are possible causes for your dog’s paralysis. Not listed but a necessary consideration for possible cause of paralysis at this advanced age is systemic cancer. Cancer present virtually anywhere in the body can lead to neurological dysfunction and even paralysis through a process known as paraneoplastic syndrome. If you still seek further information, please visit our Ask The Vet page to submit a one on one consultation with a licensed veterinarian 24 hours a day, 7 days a week.
Cervical stenosis (Wobblers Syndrome)
Degenerative myelopathy
Fibrocartilaginous embolism (FCE)
Intervertebral disc injury
Spondylosis
10 and a half year old Bernese mountain went pee on her self and not get up back end very weak. Was breathing very heavy at first now slowing down.