www.IMOM.org 
They jump in and help ALL dogs needing medical attention and in jeopardy of being euthanized. They do great work and you can watch the status of your donation right on the site.
THIS IS THEIR MISSION STATEMENT
Our Mission - IMOM
Helping people help pets.
To better the lives of sick, injured and abused companion animals. We are dedicated to insure that no companion animal has to be euthanized simply because their caretaker is financially challenged.