You should google how to care for it. The wet dog food is a good idea. Chopped earth worms is not a good idea. No feeding liquids as you can accidentally get them in the bird's lungs.
There is a remarkable rehab center in New Jersey called The Raptor Trust. Check out their website on what to do with birds of your age:
http://theraptortrust.org/the-birds/injured/nestlings/
When feeding the wet dog food, you may also use a drinking straw with the edge cut to make a "spoon."
The people who work there are WONDERFUL. I'm sure they would also talk with you if you emailed them. I know you're in Alaska, but perhaps they could "talk you through" the next stage of feeding this bird if it makes it past the next few days.
They grow quickly. I brought this organization a barn swallow last week that I had raised from a little older than your bird. I really should've brought it in sooner. Either way, I fed the bird every HALF HOUR with waxworms, cut in half butter worms, phoenix worms and meal worms. When I first got it, I did do the dog food method. I was told that I did a good job, but it's difficult to reintroduce them into the wild if they aren't raised with their own kind.
I know it's tough for you because you're likely so far away from a rehabber, but maybe they can help you from a distance. Good luck!
