If it's not walking around and doing the chick thing by day two or three, it is probably a vertebrae problem and will only get worse. I had one that managed to walk, eat and drink, but his head was always turned to the side and as he grew he got more and more contorted, and kept falling over. Finally culled it to put it out of its misery.
Structural issues will be evident in a day or two and they don't get better with vitamins.