I hate stories like this.
http://seattletimes.nwsource.com/html/localnews/2008155565_webhorses03m.html
Glad no humans were killed but a tragedy for the horses, and certainly upsetting for the driver. Remember, you are legally liable if your livestock get out and are hit. Someone could be killed or badly injured - it's not just the livestock at risk.
Take some time on the weekend and walk or ride your fenceline, as appropriate. You don't want this story to be about you.
