Pauline
We feed ours on "golden chick crumbs", available from Scats. Here is a guide that you may find useful:
http://www.poultryclub.org/ACHatch.htmAn extract from the rearing section shows: "Chicks should be offered chick crumbs of 20-22% protein containing a coccidiostat. This chemical helps to control coccidiosis and build up an immunity to the parasite".
I know that your adult chickens must not have access to the chick crumbs for if they eat it, you will not be able to eat their eggs.
I hope you have a good neighbour who will be able to come in twice a day to give them fresh water and top up their food.
Paulines7