We recently acquired a very smart and sensitive little mare for my daughter. My daughter is 10 and a beginner. She has a very heavy hand that I am working with her on and I think I need to change the bit the mare has. The mare is a very smart little thing and having watched her with a snaffle (def not the right bit for her knowledge) she is very uncomfortable and I need to find something that would do well with her sensitive mouth and my daughter's beginning hands. Any recommendations?