I hunt woodchuck so I need a real small dog for the dens in our area. I also dig possum, coon, armadillo in the winter months. I have hunted with a few Jags, but most have been too big for any serious earthwork in my neck of the world. I remember a female Jag that I hunted with that had extreme drive to get to the quarry. Fellow diggers down south of me use them on nutria and the smaller ones have worked out well. The bigger ones have been used on wild hog with good results.
Mudcat