I won't even address the 4 year old comment...You all that know me will know what I'll say.
If she was a barrel horse those rollbacks will probably just make her hotter by the way. Most of them do get hotter. Sherry Cervi tells her students that rollback make them hot as well. My three year old is the only horse I have ever met who doesn't get hot from it.
I would just send her to the trainer if you can afford it. Easier that way.
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.