Steffen Peters teaches a session with a Friesian cross 15 year old mare  schooling PSG.   The rider expresses concern with the mare losing activity and jump and a lack of responsiveness to the aids for the change due to the quality of the canter. Steffen points out that it is really an issue of how the mare listens to the riders aids each time they are used.  He asks her to warm up in all three gaits and to figure out what frame she lets go in so the mare cant use her topline against the rider.  She starts out quick in the tempo and not quite engaged enough behind.  He helps her adjust the curb chain and noseband.  When the walk is too quick he asks for a halt during which she finds the frame where the horse stretches.  They show a better walk with more relaxation and swing in the back. As they go to the canter they keep her round to help with her bracing.  When she has a bit of a problem collecting the canter they go to the walk and do a large walk pirouette.  When she tightens they counter flex making it more of a leg yield, then bend when she drops her neck a bit.  Coupled with a better response off her outside leg this exercise helps her engage her hindquarters and drop her neck.  They go to the canter and repeat the exercise.