I am sorry you have to do this. The longer you can hold onto her, the greater her chance of getting adopted. Rescues always have a waiting list for dogs needing foster homes. They can't make room open up any faster than it does. Be sure to have her courtesy posted on as many rescue sites as possible. Meanwhile, crate and rotate, to keep everyone safe.
Natty Boh 6-27-12
Annie 1998 - 8-2-12 RIP