"Versatile Vizsla" by Marion Coffman - Recently reprinted. She is still actively involved with the breed and currently serves as the Historian for The Vizsla Club of America.
2004, Beautifuly illustrated, hardcover, 240 pages ISBN 1-57779-056-1
AKC Canine Health Foundation-Discoveries-Spring 2008-Determining the Best Age to Spay or Neuter - An excellent academic review of what is known about the benefits and risks of canine spay & neuter. It also discusses the protective effect that intact ovaries and testes have on some common cancers.
Early Spay-Neuter Considerations for the Canine Athlete - This article provides evidence through a number of recent studies to suggest that veterinarians and owners working with canine athletes should revisit the standard protocol in which all dogs that are not intended for breeding are spayed and neutered at or before 6 months of age.