As far as I know nowadays some people use them as tracking and digging after rats, but I know they were used in fox hunting too to track and go after the foxes under the ground. (which I really hate). But immediately my first idea was the Jack Russell Terrier. Otherwise they are really lovely dogs with so much energy and they are really playful too :3 The today's piece will be shared tomorrow around lunch time and we will be on the right track again :D Hope you like it!