If a dog dont manifests problems moving and functioning it should be bred. Some working dogs moving and work perfectly and have shows some grade/score of hip dysplasia in the X ray .Those dogs could die with 10 -12 years without manifests problems moving and working. In the specific case of Campeiros x Serranos that come from E.Bulldog hip could be a big problem. I agree with Gsicard ..."So you have a perfectly scored dog that cannot work....There must be something more to the selection process." I my opinion for working porpouses, AKC- FCI -CBKC (conformation show) methods of selection, does detrimental damage to the breeds character, in general.