A horse will shy at a bear nearly every time, especially if they come upon them sudden.

All I did was stop when my horse shied, and try to keep her from running off down the lane.

The horse snorted and shied as they reached the bottom of the hill.

The horses shied nervously when he spun around to her.

These are often displayed when the horse is fresh or feeling rather well: shying and pulling.

The horses were shying as they came around the burning wreck.

"The hat fell off in the road, when the horse shied."

My horse snorted and shied a bit, but continued on.

The horse shied away, but none of us paid her any attention.

Her horse shied from the camel; she called, What news?