Update-
I just got off the phone with Minnow's vet. She had surgery this morning. She is in recovery now, and has had a small drink of water, and has walked around her cage a few times. Best of all she hissed at the cat in the next cage, which means that her personality is back to normal
The vet removed almost 2 baseball sized lumps of stool. He said it was hard as rock, and wouldn't have come out no matter how much laxitive she took. Minnow will have to take stool softeners for the rest of her life.
Boy I'm glad that she's ok. I didn't sleep well at all last night for worrying. She will probably come home tonight.
If you want to see a picture of Minnow you can go to:
http://pets.burnerkitty.com/3145 .