Reply #2: We had a female alpha

[benddem]

she even lifted her leg to pee. she had some problem with her legs or back and would sometimes stand on her front paws (back legs in the air) to mark trees. She was a riot...but if she and another alpha were in the area it was dreadful.
My dog now (male) is not an alpha. He does mark everything but only fights back if he is hurt.
Australian's can be trained not to herd but it is such a strong trait. Good luck. You need the help of a behaviourist. Do you ever listen to the program on NPR "calling all pets" It is broadcasted from Wisconsin Public radio...you can stream it on line. The woman answers questions...I'm sure you can email her and gives great advice.