First off, Welcome to WAB!
Secondly... oh dear, poor thing
Murphy 'could' have a back injury which is why he's so wobbly. Be sure to keep him warm by perhaps putting the carry case onto a hot water bottle wrapped in a towel. As for food, bird seed is good, chopped peanuts, sunflower seeds. If you think he's struggling a bit then just chop it up smaller for him
You may also want to try a little cooled scrambled egg (no butter or milk) just plain as it's a good energy boost for him and will give him some fluid too. I too am suprised that he made it through the night, so mabe you have a little fighter there!
Keep us posted ok
