did she do it in the school or just out hacking?
was she checked out by vet etc?
my old BSJA mare used to tank off out hacking, every time you went faster than trot.
took 3 years before we could canter in the open without her doing this
must be in scotland,closer to Edinburgh the better.
16hh + mw/hw gelding, aged 6-9 years old, must be 100 % in all ways,to do low level riding club & have fun on.
1st horse for intermediate rider,forward but must must must be sane!
decent budget.
hope someone can help find some