Over time, your dog's regular activity and movement will cause gradual degeneration in his joints and cartilage. (lovinmypup.com)
Spinal muscular atrophy involves wasting of the skeletal muscles and is caused by gradual degeneration of nerve cells in the spinal cord. (smafoundation.org)
Intervertebral disks can become displaced, deteriorate, collapse, bulge out (protrude), rupture or herniate in dogs as a result of gradual degeneration due to conformational abnormalities, obesity, genetics, repetitive trauma or other factors. (petwave.com)