dog aggression-Please help

Dallas my puppy, He makes #7

Well I'm coming in on this one a little late and you've been given some great and resonable advice earlier.
Spaying will help but it isn't the same as with males, you will still need to keep an eye on these two girls. They tend NOT to let things go and will wait for an oportunity to strike again.
Training will be one of the best things you can do for you and your dogs. Obedience training has worked for me in the post for a dog who was a rescued fighting dog. She over came her learned dog aggression by solid down stays and sits and diversions.
Housing multiple dogs/breeds can be done but YOU must identify you have to "Manage" it. It can never be thought of as a peaceful atmosphere especially when you aren't home.
I have more dogs then the average owner, we manage our dogs by identifying who can and can not play, walk, and eat together.
Please do not set your dogs up for failure by not assessing the issues that can arise
 
 

I'm going to second what amstaffy said, and add that, in some cases, spaying actually increases the likelihood that a dog may fight.  That's not a reason not to do it, however, as you want to prevent an accidental litter, especially from a bitch who is inclined to be aggressive - not a trait you want to pass on to puppies in this day and age.  Too many are already dying in shelters, and others, from unfortunate breedings, are contributing to the problems that cause Pit owners to have to worry about BSL.

This samitting thing

"samitt" them, whatever that is.

She has already explained what she meant. Please don't get your jolly's at someone asking for helps expense.

teaching BOTH bitches that bad things happen when they are near one another and that the other, by golly, IS the enemy and worthy of a good butt kicking. Congratulations. Because you refuse to accept the inherent weakness in your girl, you are teaching TWO dogs to want to damage one another. Good job.

You need to pull your head out of the sand

MY GOD! You have no right to belittle people like this (though you do it seemingly whenever the mood strikes). Give advice and leave it at that. All the rest is disrespectful.