dear sashy, experience wise.. ask those who are really competent. i would recommend to ask dog-handlers or get n touch with our member "acsyen", she is on adoption listings as well. she is thoroughly in knowledge of handling multiple canines and forming good behaving canines from god knows the state they were in before.
to read up more:
http://www.ehow.com/how_2194673_intr...ident-dog.html
http://ezinearticles.com/?Puppy-Care...r-Dog&id=13490...
junleewei: without proper knowledge that means you have just been lucky with dominance issues.
there is a painful but truthful quote in a book i once read, "there is no failure dogs, only failed owners".
good luck sashy!