What primary vermin were early Dandie Dinmont Terriers valued for hunting underground in the border country?

Answer

Badgers and otters

These terriers were highly valued by local farmers for their prowess in hunting vermin, specifically badgers and otters, requiring them to 'go to ground' in underground lairs.

What primary vermin were early Dandie Dinmont Terriers valued for hunting underground in the border country?
DogbreedTerrierDandie Dinmont Terrier