it might still be too young to wean, though had some eating and drinking as soon as can flop or waddle out of nest, then i had to keep putting them back in. did you get a sudden temp spike of even a couple or more degrees? im curious as thats seemingly when my rollers would only stop feeding. i take the chick and put its beak down in the cup (i use tea or coffee cups so they cant get in them), to just before the nostrils are touching the water two or three times and they seem to get it. i just feed out of off my fingers then get the babies to get in cups after the food keeping the cup half full at all times so it can easily see and dig into food, teaching the babies from when they are hatched the food call sound so they expect the parents or me to feed them right after in evening or whenever call and theyll come to me or the bowls/cups. sometimes babies dont remember too well so the feed call reminds them to come to food and that its there.