I have two KC hens sitting on a large nest of eggs. Today I let the ducks and chicks out. The duck hens always come out with a ruckus. They run to get feed. Then to the water to drink and then to bathe. I looked into their box while they were on their mission and found a hollow egg shell. First I thought maybe it was an egg that never developed. Looking at it farther, it looked more like one had actually hatched, but I didn't see it anywhere. I thought maybe they had eaten it or something. Finally I walked into the chicken coop (the duck box and coop are connected) and found it laying in the coop. This would have been a long journey for a newly hatched duckling. It was already fluffed out, but very weak. No signs of damage. I picked it up and it actually chirped and came to life. It looked and acted pretty normal. I wonder if it made that journey on its own or if maybe the mother duck packed it out there and dropped it.
Will they raise their young like a chicken will or am I better off separating them? I put this one in a brooder with 6 RIR pullets and 6 Buff pullets. I did put a divider between them and put a small bowl of water filled with rocks and a little food.