My mare has it quite badly. This is my experience with her:
- best living out but not gone completely
- worst after been sleeping/on the lorry
- best thing to help is to get moving forward and trot for a while
- lateral work is harder with this even when it seems to be under control (i.e. no actual locking for a while), and jumping is affected in terms of confidence and style. You have to control the whole thing to enable a decent jump even over 2ft.
- lots of trotting up hills helps, as does circles and lateral work. Idea is to build up quarters so that the muscle keeps the whole thing in place.
- with a mare, better in summer than winter (to do with coming into season)
- worst a few days before comes into season each time, best when in season.
- makes horse more vulnerable to bullies as sometimes cannot get away from a 'warning' kick so get more injuries.
- vets are reluctant to operate
- helps if unshod behind so can have a better breakover point. With normal shoes she fell over a couple of times when it was really bad (on box rest for illness).
- will get arthritis in stifles eventually (according to my vet)