Causes
The cause is not fully understood, with an immunological and genetic basis. It is neither contagious nor painful.
Diagnosis
Clinical diagnosis based on appearance. The vet rules out other causes of depigmentation.
Treatment
No treatment is needed: it is a cosmetic change, not a disease that affects wellbeing. The depigmented area may be more sensitive to the sun.
Prevention
Not preventable. Protect the areas that have lost pigment from the sun.

