My Cayuga duckling loses its balance and falls over on to its back, It is Eating and Drinking OK and seems quite healthy can you please Help me.

Hope this doesn't come to late
How old is the duckling , what food is it on, what temperature is it under if incubated/brooded artificially or is it outside with the parents,
If artificially brooded does it have sufficient enough grip on the floor i.e. towel down, do its legs look splayed to the side instead of bieng straight...
What age did it start falling over... a picture of its legs would be handy ;)

If it is been brooder by the mum bring it indoors and put it under heat of 36 degree Celsius, give him some liquid calcium aqnd some multivits in the water to help recover its energy,

Please get back to me as soon as possiblel if the bird is alive as it will help if we were supplied a little more info in order to help see what the problem is,