There were a couple of Triggers. Trigger II's sire was a walking horse
named Barker's Moonbeam. I believe that it is Trigger II that Roy
Rodgers had stuffed.
Many of the horses used in the old western movies were walkers. Watch
some of them and you see a lot of horses at the walk and a lot of them
galloping but not a whole lot of trotting. If you know what you are
looking far you can sure pick out a lot of walkers or saddlebreds in
these movies.
BTW my mare also goes back to Barker's Moonbeam in the distanct past.
Her mother was a palomino walker that could fly - in fact she could
gallop as fast as any TB I rode as a kid. The mare was also no slouch
when it came to a flat out gallop.
