My duckling was started pipping 24 hours before he came out. He was upside down and did not hatch in the airsac. When he came out i noticed he still had his yolk sac after 5 hours none more has come it and it has stayed a grayish color i have him in the incubator wrapped in towels the bottom half of the shelf remaining. I don’t know what else to do, has the sac died? Do i need to worry about food and water i have heard about sugar water?