Hello Sandy sorry to read you are having a few problems with your young horse when he stops is he looking at anything with head held high or showing fear of anything,is there any thing you can think of that maybe uncomfortable
for him like saddle friction or fitting, girth rub, bit or mouth problems,teeth,shoes ,hooves,legs,back,rider off blance,eye site,ect.

How old is he is he green.

Is there a certain place he stops or just any where going out or coming home.

Do you know why he has run off does he give you any warning.

if you can answer these qns i may have some suggestions for you as i use natural training for problem ponies i take in how ever i would need to know more about him if you feel i may be able to help let me know and i will offer some suggestions.

I have section ds and cs .