Precious may be put to sleep

Last night, my brother and I took one of our dogs to a 24 hour vet. Precious has been feeling quite ill, and with that being the case we took her to the Vet. Of course, they wanted $1000 as a deposit. Her diagnosis? Well, apparently she has some type of major infection that's affecting her kidneys. I believe that we've gone as far as we can, in regards to the care and comfort of this dog. For 5 years we've cared for our baby girl, after we found her living on the street. She'd been 5 months old and was seriously abused by people living in/near our neighborhood. Thank God we were able to take her in and love her... Even though putting her down might be the best thing to do, it still hurts.