One time Patterdale keeper. My buddy had a few a number of years back. The went on a cruise and I kept the Patterdale here. He was down out of the Mason family of dogs/Dirt Deevil family I believe.

I heard the stories and could not see it looking at the dog. About 12-14lbs. Hair was curly, yet wirey, but soft as cotton. Sweet little dog.

A possum popped up in the trash can one morning so I went and got Mr. Pickles. Upon sight you could have not shot a bullet in straighter or any faster. LOL. It was over in short order. He brought him to the door step with as much pride as a 100lb dog could muster packed in a 12lb frame.

He later won one of those rat killing in 60 second contests.

I'm no expert on these dogs but that particular one had as much finish as anything I have seen.

I can't speak for the entire Mason/Dirt Deevil family but Mr. Pickles would fit the bill you described.

EWO