Spina Bifida is a congenital defect of the spinal cord in dogs. In a healthy dog the vertebrae of the spinal column encase and protect the spinal cord. In Spina Bifida cases, a deformity in utero occurs that prevents the vertebrae from completely closing, leaving a gap and exposing the spinal cord. This deformity is more commonly seen in the lower back, down near your dog’s tail, but it can occur anywhere along the spine.