I see danger

I am by no means a professional but from what I can tell, you need to get your dog out of that environment and into some real training. You need a trainer that knows how to deal with large dominant dogs. Your dog to me has assumed the role of Alpha and will continue to do so until she is brought down. If the trainers are afraid then they are the worst people on earth to deal with her. She needs, in my opinion a very firm and confident person that will put her on her back in a split second when she acts out.

Just a word of advice on shock collars you could be making the problem worse not better. once your Akita red lines, shocking her can add to the aggression. Your really just adding fuel to the fire. Leerburg has some really good dominant dog collars that are designed to take the fight out of the dog and not add to it. Leerburg also has a lot of really good books and videos on dealing with a dominant dog. I would still seek professional help.

Please tell us more about your girl and I hope everything works out for you and your pooch