Horses That Pull Back When Saddled

Try girthing your horse up gradually. Put the girth
up just one or two holes at a time (depending on how touchy she is)
then walk her around a little, repeat this sequence until
the girth is tight enough.

Continue this each time you saddle
up, your horse will become less edgy and more trustworthy
towards you.

Eventually you will not have to walk
her as long, and you can take the girth up more in one go.