If you read nothing else on buyhavanese.com you must take the time to read THIS ONE article.
This article explains very clearly why the idea of an open database for genetic diseases in dogs is unlikely to ever become a reality.
As you read the article, remember that testing does not always give a concrete result about whether a dam or sire will produce an offspring with a genetic disease because any testing without being paired with genetic profiling and looking at common ancestral dogswill ONLY clear the dog being tested.
This is a critical read not just for Breeders but also for potential puppy owners who are contemplating getting into showing or breeding Havanese dogs.
Welcome to the World of Omertà - The Breeder's Code of Silence.