Go take pictures of your horses, the pasture and the barn/run in ASAP, like tomorrow, with newspaper in front of some of the pictures to show what day it is being taken.
Too many people think now that horses all have to be blanketed and stalled, as opposed to the ones that think they should never be blanketed and stalled.
It could also have been that one of your horses had been down for whatever reason and appeared to be caught in fence too?? Or something like that.
And may also have been report of horses further down the road or in area as I have heard of AC going to wrong address, so they didn't have to deal with what was going on with the real horses starving to death, and do mean that literally too.
Horses make me a better person.