

Mom rejected, baby seems to be born early nsfw for blood
What step should I take to try to keep this little thing alive?Mama won't have anything to do with it.Also is the umbilical situation normal
Edit to add: it's peeping, opening its eyes, scratching its chin with its foot.. like it seems viable, but this is my first time and idk what to do. I'm currently heating up a diy incubator i got the Idea from a youtube video. Currently, it's wrapped in a towel in the front of my shirt with it's head above the towel. I don't have any disillusionment about it actually making it. We didn't havr an incubator set up because everyone told us momma would care for them. It so far has taken a few drops of water from a dropper and thrown its head back to swallow. It is lively despite not being able to sit up yet... I have to atleast try and save it, even though the odds are abysmal. Anyone who has helpful advice, please comment.
And for the record: our chickens have a fully varied diet. Pellets, scratch grains, bugs, worms, seeds, berries, leftover veggies, boiled eggs, oyster shell. Literally everything we can think of that's chicken safe.