I have a 27 year old mare who is an ex school horse. She has not been rode in quite some time, and I have just moved her to a new home. My nephew (7) has taken quite a bit of interest in her. I have put him on her bareback and led him around, and am wondering if I can just get a western saddle for him ride her? I know the style bit she uses, but not sure if I could switch the saddle? Thanks for your help!