Ifyourhorsehaslearnedhow tonibblethe quick-release knot and freehimself, youwill haveto "horse-proof" the knot by dropping thetailoftheropethroughthe loop as shown here.
The snow is really assaulting the windshield as I head for the Louisville junction, the dog turning tight circles in the back, then dropping down into a ball and tucking her nose into her tail, resigning herself to yet another hundred miles of bleak highway.