You can try giving the chick to her during the morning/day but if she pecks at it when wait until the night time. Chicks have the yolk sac so can go up to 72 hours without food, I'm not sure about water although hatcheries ship chicks that take about 2 days to get to people's homes so I am guessing it is not an issue either. But ofcourse if the mom will accept the chick, the sooner the better.