Leslie, that may not be the case.... though I only bred to OFA registered B*tches or Studs , 3 of the over 100 pups ( over a 40 yr span ) came up with HD . One definately came from fast growth due to adult food too young and over working the hip joints .... the others ( my Chip ) and one in Florida were diagnosed when young and could have been a throw back or because of food and activity. I'll never know. When buying a pup the testing proves that they care about the off spring, but it does not guarantee anything. I did , in my contracts , offer a return policy for any health issues. Two were not that bad and they choice to keep the pup and treat with meds... Chip's owners went all the way and spent $1600 on surgery etc..... and yet 4 years later they gave him up to rescue because they moved and didn't want a hyper dog !!! Lord.... he has had no issues here, health or otherwise !!! Go figure... their loss, my gain !!! Everynight ,I thank my lucky stars !!