I can't imagine why you would worry.. Bareback and bridleless your mare is better behaved and trained than 95% of the horses on this board.

I found a new jack for your mare! =)
http://www.timberlakemules.com/Artie_Really%20Dun%20It.htm

"Blessed are the flexible for they shall not get bent out of shape"
"You can discipline and Discourage or you can Discipline and Encourage"
"Gentle in what you do , But firm in how you do it"