The term, "Responsible Breeders" signifies that the breeder has taken responsibility to do many things. One of them is to get a DNA test on their Volpino's before breeding or bought puppies from parents who were DNA tested for PLL so puppies would be OK. If one parent is a Carrier then puppies have to be tested before they are sold and given to the new owner. They should also receive a UKC Registration Certificate.
Here in America our club has known about PLL since Spring 2010. Italy has known about PLL since 1994 but no DNA test for PLL was available until September 2009. North American Volpino Club sent letters to Italy ENCI which is equivalent to America's AKC and all Volpino Clubs around the world to warn them that they need DNA testing before they breed.