Figure 5 Extended pedigree analysis from all normal, carrier and affected dogs for which pedigree information was available. All of the 14 affected and 34 carrier dogs for which pedigree information was available could be traced back to a common ancestry (red letter A), supportive of a common founder effect. The numbering on the pedigree corresponds to the dog numbering in fig 3 (A, clinically affected; C, obligate carrier; N, clinically normal but related).