Not involving horses, but my step-mother had a similar experience several months after my father passed away. In her dream he told her that everything was ok. She too awakened with tears. Do you suppose the mare has passed on? Sometimes people experience this at the time of passing of a much loved one. My hubby worked 300 mi. distant and I was watching tv. Suddenly, I was on my feet and feeling wrestless. Something was wrong, but what? Didn't sleep that night. Late the following afternoon hubby called. I answered the phone with "What happened?", not hello. He'd been in an accident during a snow storm, not seriously hurt but spent the night in hospital. The times coincided with my suddenly fit of wrestlessness. We were both kind of stunned that I had sensed this.