LOL, we ought to work good together, we've been doing it every summer with these cattle since about 1990...so I would have been 6. But, we used to have our own cattle so I was doing it as soon as I could ride. I remember starting when I was about 3 and riding Olen (picture me on a mini-burro pushing longhorn cows

).
I don't know about the working your way up and then back down, it's really only been the 3 of us and when I was a kid, it was just my responsibility to sit on the fence and make sure the count was right going on the truck. They use to load afoot and didn't want me to get stepped on. Even after I started helping, I insisted on staying on my horse after I got run over half a dozen times. It just evolved from there...and I'm glad. I'm clumsy and slow on my own 2 feet. On a horse, I'm much more efficient

.