Renal dysplasia in dogs is a severe kidney disease that causes great suffering for the affected individual. The disease disturbs the development of the kidneys which leads to an immature microscopic structure of the kidney and smaller kidneys than normal. A dog with renal dysplasia only lives between 4 and 24 months, because of kidney failure. There are different ways to establish a diagnosis, but the most common way today is to take a renal biopsy. In a scientific study, ultrasound based diagnosis was shown to match the histopathological picture of the disease.