I had a chick doing the same thing about a week ago. He kept falling into the waterer and looked horrible (only a few wing feather buds and all his fluff stayed matted from his wet falls), but he was still trying to eat and drink despite going into flipping fits and having intermittent seizures.
I isolated him from his flock mates, gave him a shallow waterer with a smidgeon of ACV, a paper plate as a feeder so he could reach in even when he couldn't right his head, and made a paste with some starter feed, vitamin E oil, selenium (broke a tablet into quarters and crushed it), half a tablet of vitamin B6 crushed, and some electrolyte water (specifically for the B12 it contained). He wasn't much interested in it when it was damp so I let it dry some and then crumbled it up and gave it to him.
Success. He ate all of it like it was going out of style. The second day he was looking a little bit worse with more frequent seizures so I upped the mash/ crumble ration to twice a day. By the third morning he started to keep his head righted for longer periods of time before tucking and the seizures had returned to being intermittent. I went to the store and got some plain greek yogurt (it had probiotics in it where the regular one was sugary nothingness). I made the same mash before mixing it in with just a little dollop of the yogurt. It was the consistency of granola after mixing thoroughly.
To say he was ravenous about it is an understatement. I wish I would have got a picture of him eyes deep in the little pile. He ate it all and chirped for more. Three days of yogurt mash and you couldn't tell there was ever anything wrong with him. Seizures gone, no more tucking, fluff all filled back out and feather buds starting to come in all over his little wings. He's still separated from the others for now, but he's begun attempting to fly out of his little enclosure so I'd say he's just about ready to go.
I think his problem might have been a case of wry neck that resulted in slight brain injury from all the falling, but something within this combination got him on the right track to healing. I wish you the best of luck with your baby!!
PS: When I get home I'll look at the Selenium and B6 bottles to get the exact dosages.