Bob halts very square and perfectly when asked.
For approximately half a second.
Then we have backing up, fidgeting, walking sideways or doing un-requested turns on the forehand

.
We have a dressage test in 9 days... one of the requirements is 'halt, immobility 5 seconds'. I don't think Bob has ever stood still for this long in his life!
Any tips for getting him to halt better?
xxx