Wobbling is not automatically WHS. Cold temperatures, ear infections, injury, tumours and nutritional problems all cause similar symptoms — and several of those are treatable. Always see an exotics vet first.
What it is
WHS is a degenerative disease of the nervous system. The protective coating around the spinal cord and nerves breaks down, so signals to the muscles fail. It usually starts in the hind end and moves forward. It is progressive, incurable, and eventually fatal.
Early signs
- A wobble or sway when standing still, often worse on one side
- Falling over while trying to walk or climb
- Difficulty getting on or off the wheel, then abandoning the wheel entirely
- Trouble curling into a full ball
- Steady weight loss even while still eating
- A tripod stance, with one leg dragging behind
Most cases begin before two years of age, though it can appear at any age.
How it is diagnosed
There is no live test. A definitive diagnosis is only possible on post-mortem examination of nervous tissue. In a living hedgehog, a vet diagnoses "suspected WHS" by ruling out everything else — that is why a suspected flag is worth recording honestly rather than treating as a verdict.
Care for an affected hedgehog
There is no cure, but good supportive care buys comfortable months: a low, flat enclosure with no climbing, a removed wheel once falling starts, shallow food and water bowls, hand-feeding if needed, extra warmth, and frequent weighing. Your vet may suggest supplements and pain management. Decide in advance with your vet what quality of life looks like for your hedgehog.
Why lineage matters
WHS is widely believed to have a hereditary component. Responsible breeders retire lines where WHS appears and are open about it. A breeder who claims their lines are "100% WHS free" is telling you something impossible — nobody can test for it in a living animal.
That is why the Ark's pedigree tracker checks three generations of ancestors and puts an amber warning on any animal with a suspected or confirmed ancestor. It is not a diagnosis — it is a prompt to ask better questions.
Questions to ask your breeder
- Has WHS ever appeared in this line? What did you do about it?
- Can I see the pedigree, including grandparents and their breeders of origin?
- Do you stay in touch with previous homes and hear about health outcomes?
- What is your policy if my hedgehog develops WHS?
Record it in the Ark
Add your hedgehog's sire, dam and grandparents with their WHS status, and lineage warnings appear automatically.