My Thoroughbred is solid in his halt/walk/trot transitions, but his canter is all uncollected and sloppy. He'll canter from a trot on the lunge line, but when he comes back down to the trot, he rushes and he can't go back to the nice even pace right away. Under saddle, he can trot from a halt or vise versa easily. I've actually gotten him to canter from a halt a couple of times, and it's more collected and controlled then. But if he canters from a trot, it gets sloppy and rushed again. He's good about picking up the correct lead, he's just really messy about it.
I'm going to start him on side reins again next time I'm out there. Any advice is appreciated!