Researchers from The University of Queensland have identified a missense mutation in Bull Terriers with Polycystic Kidney Disease (BTPKD) and have developed a corresponding SNP-based molecular diagnostic. The test may allow the mutant gene to be bred out by diagnosing affected animals prior to breeding and the disease developing. This technology is easy to use, and more accurate, less expensive more sensitive and specific than current tests. It can be used on different clinical samples, including blood, hair and buccal swabs and pups can be tested prior to rehoming, before renal cysts develop.