Even when there is no test, or a known mode of inheritance, much can still be done to reduce the incidence of affected and carrier animals. (ckcsc.org)
A simple dominant mode of inheritance can be excluded because the vast majority of affected dogs were born to clinically normal parents. (iwfoundation.org)
Two important aspects of the disorder for the breed include a defined mode of inheritance, and determination of the pedigree spread of the genetic defect in the breed. (oldenglishsheepdogclubofamerica.org)