The horse is sensitive but has a good temperament. The only thing going on right now is that the owner feels the horse still has a very 'green' canter-- she will 'suck back' and break gait and is not very balanced in the canter when in the arena on the flat.
When the horse is ridden on a slight uphill, straight up a trail, the canter is fine. When the horse is pointed at a fence in the arena (by her H/J trainer- not the owner), her canter is fine.
I'm not sure what to make of this and I haven't personally seen the horse but I'm wondering about a horse that has been under saddle at least 2 to 3 years that still has a 'green' canter.
Does this seem like something that could be overcome with training or is this a sign that the horse is badly conformed and /or not very athletic?