I think the discussions of dominance, alphas has become a bit overdone...mostly because of that kucklehead Cesar Milan. The vast majority of dogs are not leaders, same as with people. The Aussies are brilliant at reading the slightest of body movements and body language. That's why they almost seem to be mind readers. If you give them a command but don't truly mean it and your body language communicates otherwise, they'll follow your body language and not your command. I often tell my students that I am very physical with dogs. That doesn't mean I lay a hand on them...but I do a lot of communicating with body language and energy. In fact, most of the commands my dog has learned (and I'm convinced she is part aussie) are hand signals. It's all good stuff. You're lucky to have those Aussies...they're great dogs. Oh...and Bob...just remember, whomever controls the food...the space in front of the dog...and the migration (walks) is the alpha. And there are some great ways to achieve this.