Seems like when our dogs get left in the dust it is usually in the briar thickets. One time we actually witnessed a hog running at top speed, go right through a tightly woven briar thicket and the dog was right on its heels. the hog disappeared and the poor dog was bounced off of the briar mesh like a trampolene. Those hogs are built aerodynamic and can run at top speed through the crap that makes a dog have to slow down and find a way through it. So i voted other.