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Degenerative Lumbosacral Disease (DLSS) in Dogs
aka degenerative lumbosacral stenosis, cauda equina syndrome, or lumbosacral instability
Degenerative lumbosacral disease (DLSS) is a painful condition affecting the lower back where the spine meets the pelvis (L7–S1 junction).
In this disease:
- the disc degenerates,
- the joint becomes unstable,
- surrounding tissues thicken,
- and the nerves of the cauda equina become compressed.
This causes:
- severe lower back pain,
- hindlimb weakness,
- difficulty rising or jumping,
- reluctance to work or exercise, and sometimes urinary or faecal incontinence.
DLSS is especially common in: German Shepherd Dogs, working dogs, large active breeds

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