There are no foods off limit with Corid.
Feed them chick starter. Make sure they have grit available.
They need fresh air and access to sunshine as well.
Dose for powdered Corid is 1 1/2 tsp per gallon of water given for 5-7 days as the only source of drinking water.
Check to make sure you are giving the correct dose.
I would treat them all with the Corid.
In the mean time you can offer the sickest ones some white cooked rice with buttermilk. Make sure they are staying hydrated.
