I've got a 15.2 Percheron/Appaloosa 6 year old mare that drops her left shoulder with the left lead. She's green,she's just started w/t/c this summer and would like some tips on how to get her to pick up that shoulder.Any and all help is greatly apperciated.

work on her lateral flexion. She either drops it out of habit or because she is not flexible enough to bend though the corner. either way, flexion excorcises will help