sometimes it sorts itself out because i had a welsh mountain pony her feet were slightly turned out and she still stands like that but it hasnt been a problem she has been showed and jumped and although the judges do point out her outurned feet but otherwise she has done really well

it sounds as though she does have a conformation fault- although good work with the farrier, a quick check-over by the vet, and plenty of exercise (out 24/7 up until at least 2yrs old) in the field would help conformation and strenght.

There is a strong possibilty that, with age (up to about 6yrs old) her legs will get stronger and will be nothing to worry about.

You will probably always have to keep an eye on her workload (the tendons and ligaments will be slightly longer so with work, its more likely that she would have a accident and end up retireing early). However, with careful management she should go on and have a normal life.

my mare is 5yrs old and her back legs slightly  turn in she has been like it since a baby but doesnt afect her in any way at all so i wud she that mite just be her back leg and theat is the way they are .