top class digging terriers
Check out this video about Patterdale Terriers.
A must watch is you believe you have a dog from the Cocker line of dogs or you are interested in this line of dogs.
Check out this video on the bloodlines that we use in our dogs.
Here is a good video that covers every thing that Terrier work entails.
Here is a video that speak about the difference between a digging dog and a terrier as the two are not equal in terms of quality.