purebred dogs vs mixed or designer breeds

mixed or designer breeds are not necessarily better than purebred dogs. It has to do with how the breeding is done. By reviewing parentage and testing for genetic markers you have a chance to improve the breed...not by simply mixing this with that!

healthypets.mercola.com/sites/healthypets/archive/2013/07/05/pet-genetic-disorders.aspx?e_cid=20130705_PetsNL_art_1&utm_source=petnl&utm_medium=email&utm_content=art1&utm_campaign=20130705