three of our eggs hatched with chicks like this. They have large raw or possibly open navel bulges. Even the ones that have dried out and fluffed their feathers still have it and currently we are keeping them separated from the others. What is this? Is it curable? How do I treat it? and [insert any other questions I have left here]? These chicks are from eggs found by my child here and there on the ground as we live in a neighborhood with many loose chickens that lay all over the place. I'm worried it is from dirty eggs or sick hens laying them but have no idea. They seem to be fine otherwise.... however I have no previous experience.