I've recently got a 7 month old gsd female which I plan on titling in schutzhund. Everyone has told me to keep her separated from the other dogs in the household but this past week with her away at the kennels because of her heat has been so easy. My other two dogs, 2yr male rottie and a 12 yr staffie females, need no supervision and can be left with the run of the house for the whole day with no problems. Do you think it would be possible to her and the rottie be out together when i'm home? I've been told the main problem is she'll become too doggie and attached to him.

Is it possible to have a balance in the house yet still have her at high drives and focus on me?

Of course it's possible to have balance - but you have THREE dogs to balance.
If you want to have them out together, you can try it - on lead, maybe after a long walk or some tiring exercise, with you there to supervise only.
It really depends on where you are at with your pup in training. How long have you had her? How's your focus work? With distractions? Does the pup listen to you when there are dogs around distracting?
As for leaving the pup out when you are gone - I wouldn't. It's asking for problems.
I never leave dogs out when no one is home. All dogs need supervision when out - even the rottie and staffie! It will be hard enough to raise a pup for schutzhund without having to deal with rank issues as well. You leave one dog (or two dogs) without boundaries in the home (as in leaving them free while you are gone) it will effect the whole pack. With strong protective breeds, it really is better to have structure, and maintain the boundaries created when you are not home. Crate, backyard, separate room, something.
Not only that, but when owners make emergency runs to the vet you hear a lot of "he's always been out, he has never done anything like this before". With unsupervised dogs, it can be just a matter of time before you end up with injuries. JMHO

 Quote: cameron feathers

As for leaving the pup out when you are gone - I wouldn't. It's asking for problems. ... Not only that, but when owners make emergency runs to the vet you hear a lot of "he's always been out, he has never done anything like this before". With unsupervised dogs, it can be just a matter of time before you end up with injuries. JMHO

Ditto, and add stolen, teased, and even poisoned dogs.

QUOTE: I never leave dogs out when no one is home. All dogs need supervision when out - even the rottie and staffie! It will be hard enough to raise a pup for schutzhund without having to deal with rank issues as well. END

and

 Quote: Craig Brown

... I've been told the main problem is she'll become too doggie and attached to him.

The staffie and rott are fine and we wont change that because they've never caused problems. The maid is there 4 days a week so they generally have some supervision but they now have to be in the front because the pup is in her run at the back and she starts barking when they come out. Still need to cover the fence up with cloth so she cant see out.