We were on some sort of a trail and came to a fork in the trail with an unusually large sagebrush at the fork. Suddenly the mare planted all four feet and snorted. I sensed she wanted to run home, so I gathered her up, and I am bareback!!! and held on tight. I could see nothing, smell nothing, no tracks, anything. Then she began to shake in freight. It was all I could do to hold her. She would go no farther.
I made her walk back to the house and it was the last mile that she began to stop shaking.
Old timers told me it was a cat marking post and that she had smelled it. I thought it I turned around to see what was behind me, I would lose my balance and if she took off I was a gonner.
They have since killed big cats in that area as well as black bears.