Polyneuropathy — disease affecting multiple peripheral nerves — causes progressive weakness, pain, and loss of function in dogs, with both breed-specific hereditary forms and acquired causes requiring different management approaches.
Canine polyneuropathy causes progressive welfare decline that can be insidious in early stages but significant over time. Affected dogs lose their ability to exercise normally, climb stairs, or jump — activities that provide physical and psychological enrichment. The concurrent laryngeal paralysis that frequently accompanies polyneuropathy in large breeds causes chronic respiratory noise, exercise intolerance, and risk of aspiration pneumonia — a potentially fatal complication. Dogs with polyneuropathy may appear to adapt behaviourally to their limitations, leading owners to underestimate the welfare impact. Pain is variable but can be significant, particularly in immune-mediated or inflammatory neuropathies. For acquired forms with treatable underlying causes — hypothyroidism, diabetes — management of the primary condition may produce meaningful neurological improvement. Hereditary forms require careful welfare monitoring and honest quality-of-life assessment as the disease progresses.