mine didn't have food near the nest; but one may have hatched earlier than the others. It will be interesting to see how long it takes the other 3 to catch up in the feathering game.
Then I will still guess its 60% gene related, and 40% it sleeping on her side. Right now I'd say Cruella babies are 3 days behind on feather growth, so I'd assume yours are about 3-2 days