What all is wrong with her? Is it just the fact you have no vet around to help? but she has something that CAN be helped? Or just too far gone? In my own opinion, I took on 2 very very sick uro's that a pet store was neglecting something awful. One was near death and the other there wasn't much hope for either. But with proper care, nutrition, etc, they came around dramatically!
So just wondering if you REALLY want to put her down, or just really need help???
Whichever you decide, I understand. Just in my heart feel that maybe something more could be done if it were me.