Ok I'll have to try those suggestions. I can't really take her out with another horse though because most of the riders I know are still at fairly inexperienced and wouldn't be able to gallop. The only rider I know that does gallop has a small pony and my mare only has to canter fast to keep up with his gallop lol. Perhaps the rider can ride her pony waaayyyy up ahead and then I ask my mare to gallop?
There are lots of dirt tracks around here - would they be suitable in dry weather for galloping (its dry now)? I thought I could maybe take her for a ride and face her towards home and then try a gallop as she'll be wanting to go faster then anyway.
I don't think I'll try the crop though... that just annoys her and make her pigroot