Also do you know that identity of the person that was stealing her food? because they're just as much to blame as the owner of the agistment, and should also have their name(s) plastered all over the news too, take no prisoners when it comes to animal cruelty!
I don't think you were being followed by the thief, it sounds like to me that the owner was the one watching you, and calling the thief to inform them of when you fed your horse.
HANG 'EM BOTH UP TO DRY!!!!!!!!
How would they like to be starved, beaten and left out in the cold.
Good luck with the law suit, definately keep us all updated.