EOAD (Early Onset Adult Deafness). A test is now a available from https://mydogdna.com/home
As of 3-8-2020: I’ve tested the following Stud dogs:
Imported Coal EOAD CLEAR
Imported Glen EOAD CLEAR
Imported Jimmy EOADCLEAR
An analysis of the inheritance pattern of an adult-onset hearing loss in Border Collie dogs. Canine Genet Epidemiol v.1; 2014 PMC4574391
Thompsons Border Collies 
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