Their tails aren't broke are they? Please tell me there is a brace of some sort underneath their tails.
The Walker lost it's job after WWII (as most working horses did) and became a "show horse." It became a pass time, a bragging right. Function was slain on the altar of form. I've had BL types tell me, with a straight face, that the BL gait permitted the horse to step over rows of crops in the field. That's why it was developed. If you just look at the front end you might buy this bit of poppycock. If you look at the back end you'll know that somebody just tried to blow sunshine up your kilt.
Besides, only an idiot would ride a horse through a field with a growing crop.
The BL is an adaptation of the ASB gait popular in the late '40s and early '50s. The ASB equipment was used. The Walker folks, however, added the "soring" of the horse as a way to enhance the already grotesque movement generated by the stacks and chains and long toes. Sadly, the crowd that loved the ASB movement loved the Sore Lick movement equally well. That being the case it has been at the center of the TWH show world since 1952; it will likely be there for a very long time in the future.