Well, some breeds hitch at a gallop because of the proportions of their legs v. body â for example dachshunds, because their legs are very short. They were bred to tunnel, though, not gallop.
But itâs just as likely that many of the JRTs youâve seen are bred by bad, backyard breeders who arenât breeding to the standard and/or are not testing for/selecting for health - especially the obvious hip and elbow dysplasia, and luxating patellas which plague many breeds.
So, before anyone jumps on a soapbox about tail docking, especially when done by reputable breeders - they should be sure they arenât the same people buying puppies from an Amish puppy mill, âbackyard breedersâ, or buy one of the gazillions of doodle mixes that are produced without health testing. Many more dogs are at risk for serious and long lasting issues from hips, elbows and patellas, as well as congenital heart and eye issues than docked tails.
ETA: for example, FB friend who is a lovely person. Bought (although the âbreederâ used the word âadoptionâ) two doodle littermates ($2K each) last year. One has barely any femoral head at all in one hip. The surgery is out of their price range as that puppy and the littermate will probably need multiple surgeries as all their hips are bad. 100% inexcusable.