I like to imagine that my borkos just dig with their paws and they have some cool sophisticated.. mining gloves or whatever that protect their paws from the sharp rocks.
Canon-ly we do have pickaxes that they just hold in their mouths, but I'm just imagining how dizzy they'll get swinging their heads back and forth all the time lol. Maybe magic? I'm sure some more magic inclined wolves just have a blast shooting fireballs and explosions everywhere--- not sure if that's very efficient mining tho haha.
How do you imagine it in your head when your wolves go mining?
edit: spelling mistakes >:|