The Bone Collector is a simple yet effective tool to improve straightness off the arena’s edge.
The exercise is easily changed to suit you and your horse’s level; you can make it more ‘advanced’ by adding various transitions and altering the sizes of your circles.
There is no set gait to start or end, although it is a good idea to walk the pattern first to get an idea of the shape. Ultimately, you can do the exercise in all three gaits depending on your horse’s experience level.