it sounds like you are doing a great job. I personnaly went to the pet swtore and bought some baby bird food and a seringe. and kept feeding my baby sparrow every 30 minutes . I also got some small meal worms and mix it with applesause and feed the bird with a tweezer. it seems to work if you have any other questions plese email me at [email protected]
i am by no means an expert this has just worked for me !;0)