Dogs with the best endurance and ability in the field are bred, while dogs with less drive are taken out of breeding programs. (starstrucklabradors.com)
This would allow development of screening tests to identify carrier and affected dogs so they may be removed from breeding programs. (oldenglishsheepdogclubofamerica.org)
Approximately 120 individuals now survive in captive breeding programs. (discovermagazine.com)