Degenerative Myelopathy
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Imagine the confusion and fear you'd be feeling if you were approaching your middle years and suddenly developed difficulty walking. The same bewilderment hits middle-aged dogs who have a progressive nerve disorder known as degenerative myelopathy (DM). The disease causes the dog to slowly lose coordination of its hind legs, which also become increasingly weak. It's caused by a deterioration of structures within the spinal cord that are responsible for transmitting nerve impulses. This degeneration can occur anywhere along the spinal column, but usually affects the lower back. Degenerative myelopathy is only found in dogs that are at least 5 years of age or older. The cause is not yet understood; although it's theorized that it could be related to an autoimmune response, in which the body immune system mistakenly attacks its own cells. [...]