I only have two dogs so I can't address your multiple dog issues but I will recommend right away not to 'hold her down' or practice the alpha roll in any way.
This made my dominant male Westie even more aggressive around other dogs.
Someone with more training knowledge than myself may chime in.
A visit from a professional trainer/behaviorist may be in order.
Best of luck to you.
__________________  Mommy to Lucy, Ringo, and Matthew |