Ok on the Brittany Club website it says that Breeding Stock should have: OFA, GDC, or Pennhip certification #'s on hips. I know the OFA, but what about the other two expesially (sp) the GDC. I have heard of the Pennhip before, but not sure what it is. The GDC though I have never heard of. Does anyone know what it is?
PennHIP (from University of Pennsylvania Hip Improvement Program) is a closed registry that was developed by Dr. Gail Smith at the University of Pennsylvania School of Veterinary Medicine. In studies of the mechanics of the hip joint, Dr. Smith found that the hip extended view could actually mask some of the hip laxity. He determined that a neutral position, where the hips are positioned as though the dog were standing, best showed maximum laxity. An additional benefit of this position is that it produces a much more consistent reading. A distraction index (DI) is then calculated from the x-ray. This is an objective value measuring the percent of potential movement of the femoral head in the hip socket. The smaller the DI, the tighter the hips. So a DI of .23 would be a very tight hip, and a DI of .83 would be an extremely loose hip. But best of all, the readings can be done as early as 4 months; test have shown an extremely high degree of correlation between readings done at 4 months and those done at 2 years using PennHIP methods. GDC is similar to OFA, except that it is an open registry.