I just bought two horses. A quarter horse and an appaloosa. The appaloosa seems to have to have a lot of direction. I have about a mile long dirt rode that I am riding them on now and it is a state maintained road so its pretty wide. When I ride her she seems to want to zig-zag to each side of the road like shes off in lah lah land. I have to constantly pull her back in the road. Shes a very gentle horse but I don't know why she does this. Any suggestions?????