I know how you feel Thorn4, maybe the woman that phoned was in a bad mood that day, it happened, it don't understand about that too much attention thing! I would if the horse had an infectious disease, but a leg injury?
I have been in a similar situation, I had to leave a show early because of my dad's work, leaving the horse plaited and tacked, but I told the BO and her daughter... I got a phone call from them the next day saying I wasn't welcome to the next show... I was 12 at the time. I could go back there, leaving friends etc.
I think you should move on and find a new place to go to, even though you love fudge...
Keep your feet on the ground when your head's in the clouds.