Thanks! I'll wail until tonight and candle one last time.My Marans eggs typically pip/hatch 12 - 24 hours after the others. I'd give them the rest of today to see if they will hatch. If they have not pipped by the time you put the foster chicks under the hen then it is probably time to remove them. You can leave them one more night and then take them out in the morning. Just my opinion. If you have a strong flashlight you could try to candle them. If all you can see is an air cell at one end, you'll know they are fully developed. If you can see light in the whole egg or black blobs, you'll know it is time to toss them.