He is in shock... just keeping him hydrated will be a major achievement... dont worry about the feed for now... keep dribbling the electrolyte water along his beak (make sure you have the correct dosage of the electrolyte in the water... do not add sugar nor anything else to it).
As to your...
You have done the right thing... Let them rest and recover and recover for a day and then offer a small bowl of live culture yogurt and get some (farmed) mealworms (bait store or pet store) and top off the feed and yogurt with those >>> off it close to them so they can see them wriggling and...