Right....get the chick off smooth surfaces which cause the problem.
Two person job ideally.Take a plaster (Band Aid)....finger size. Someone holds the body of the chick, the other person carefully pulls the legs into line. Apply the Band Aid between the legs at the top of them (pad between the legs, sticky bits around each leg), making sure the vent is not covered.. The chick will immediately stand upright, and will function normally. Leave the Band Aid on for 4-5 days or until it drops off, only replacing it if the chick is not walking normally. Always worked for me.
There are videos on youtube if my instructions aren't very clear,
Good Luck,
sandie