As with all giant breeds of dogs hip function is of great importance.  Unfortunately, after over 30 years of research no genetic marker has been identified for hip dysplasia.  That is not to say that that hip screening for breeding stock isn't valid. Breeders should screen their stock with either OFA or Pennhip or via a private radiologist and orthopedic specialist but with the Neapolitan Mastiff we must look at form and function in conjunction with conventional testing.  The Neapolitan has "looser hips" than other breeds and too often is mis-diagnosed as having HD when in fact it is not.  Until more research is done in this area, we would encourage puppy owners to maintain a close relationship with their breeder to discuss any diagnosis and treatment options.

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