The GWP has a good record generally in terms of hip dysplasia, however to ensure this continues it is advised that both parents should be hip scored under the BVA/KC scheme and have values close to (ideally less) than the breed average. Hip scoring of parents is mandatory for KC Assured Breeders only at present.
DNA Test - VWD
Von Willebrands disease is deficiency in a specific blood clotting factor. Dogs with vWD are prone to prolonged bleeding when injured or after surgery etc. This is an inherited condition which can be avoided by breeding from unaffected dogs. Whilst relatively rare, this test is mandatory for KC Registration of puppies at the request of the GWPC.
Many GWP breeders conduct a number of other tests voluntarily, such as Elbow Dysplasia, Shoulder Dysplasia, Eye testing and Heart testing.
Details of all the various KC screening schemes, both veterinary and DNA, in the UK can be found at Kennel Club - Dog Health