They are less than 6 weeks. In the correct conditions, the umbilical scar will close up completely in 7-10 days. When they are put into an enclosure prematurely, it can take weeks or months.So, he says he kept them in the incubator with wet paper towels and soaked them every few days.
How old would you say they are? There’s a definite size difference
Paper towels are fine for a day or two tops, but then they begin to eat them. They should have food in the brooder box, and babies need to be soaked daily.