I'm on day 28-29 of a batch of mixed babies (indian runners, swedish black, and white pekins.) 3 have pipped (12 hours ago) and 7 have not. One of the ones that hasn't pipped when I very carefully candled it to make sure it was still alright in there, the inside had a yellow-green tint, like the color of cartoon mucus. The baby was still moving around, but every other egg had a clean orange glow look to it. Is this okay? What should I do?