Well, the thing I don't understand is, it was in the middle of my field. Wood ducks nest in trees, the closest trees are about 200 yards. Isn't that rather far for this little this to be out n its own?
He seems to be doing good today. I put a chunk of sod/grass in the brooder with him and sprinkled food on it hoping it would help him eat, and it did! I am having a terrible time finding a duck friend for him though.
And I called the rehab, they told me to put him back where I found him and he would find his mom...
I'm in the UK and it's the same story here if you try to get help for a wild animal.
This is why I took in a mallard duckling without prior experience of ducks! They wanted me to stick it back outside on the hottest day of the year -after we'd explained that it had been taken by a brat of a child so didn't know where it had come from...
Ah the wonders of imprinting before you can get any company for the little tyke

She's a happy well looked after duck though- so I'm glad I didn't have the heart to put her back out to cook.
And to second what many have said - try chicks for company; I've had success with lone domestic ducklings this way - though by the time I had chicks to introduce to the first wild duck, it was seriously hostile towards them; she was only about a week old at that point too.
Give it a whirl though as it doesn't hurt to try!