Today, while doing barn chores I found a barn finch doing the army crawl on the ground. She can flap both wings, but doesn't seem to be able to walk or get enough momentum to fly.

I would like to try to save this little bird because I'm a softie and hate to see anything suffer. I have made her a little 'nest' in a cage since she cannot perch, and gave her little food and water dishes. She appears to have tried to eat and drink once. Other than that she pretty much lays cocked on her side and has a fast respiration rate (due to pain? fear?) Any instructions or ideas would be greatly appreciated!