Don't Put a Puppy Down

I just got an 11 week old puppy 5 days ago and she has Parvo, which means she is slowly becoming dehydrated due to vomiting and bloody diarrhea. She is a more delicate case because she is also anemic. My options are to hospitalize her or put her down. The hospitalization cost minimum $5500 but I can't let her be put down. Please help if you can!