Join Date: Oct 2010
Location: Some times Llanelian - North wales, sometimes Hull in East Yorkshire (UK)
It can be grown out of, normaly with muscle and good work.
We had a section youngster A who had it, sometimes so badly that you had to push him backwards o get it to unlock.
Anyway by the time he was 6 yrs old you could not tell that he had a problem.
It is a very common thing in welsh section A's, It is normaly (at least in welshies) inherited from parents, so I would never breed the mare if you do get her.
I'm not sure I would buy a horse with the issue, it is a large gamble as she may not grow out of it.
RIDE your horse FORWARDS and keep him STRAIGHT