Whew, a case of all's well that ends well.
The owners of this morning's stray horse just picked her up after their call to the sheriff's office matched up with mine. She had escaped her pen, and gone across this area's mostly open country until she got as far as our place.
So after a little time tucked safely into our barn, she stepped nicely into their trailer for a ride back home.
Despite some evidence to the contrary, it usually does pay to do unto others as you would have them do for you.