Oh, you are so NOT alone in this situation.
I went through it last year and it was terribly stressful on everyone involved. I made the heart-wrenching decision to rehome one of my females and as hard as it was (and it WAS just about killing me), it turned out better than I could have hoped for. You can read all about it in this link...which also has the begininning link attached inside of it. Also, two of my blog entries are about my experiance; the awful beginning and the happy ending.
Good luck to you with your decision and hugs............
http://www.yorkietalk.com/forums/gen...avy-heart.html