What are the most common training mistakes in pleasure driving horses?

Rushing the ground driving phase is one of the most frequent and consequential mistakes in starting a driving horse. Hitching a horse before it reliably responds to the reins in long lines creates confusion and resistance that becomes deeply ingrained. Another common problem is allowing an inconsistent trot pace — either too slow and labored at the working trot, or rushing and losing rhythm at the strong trot. Both problems typically stem from the driver failing to establish and maintain a consistent tempo with steady hands. Overdriving, meaning pushing the horse for more extension than it can produce in balance, creates a strung-out, heavy way of going that scores poorly. Harness fit is frequently overlooked as a source of training resistance. A collar that pinches, a crupper that sits incorrectly, or traces set at the wrong length create discomfort that shows up as tail wringing, ear pinning, or uneven movement. Transitions are also commonly neglected — many drivers practice gaits in isolation without working on the quality of the moments between them. Clean, willing transitions are one of the clearest indicators of correct training and are evaluated by judges in every pleasure driving class.